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1

Gunlycke, Daniel, and Frank Tseng. "Triangular lattice exciton model." Physical Chemistry Chemical Physics 18, no. 12 (2016): 8579–86. http://dx.doi.org/10.1039/c6cp00205f.

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2

Kayanuma, Y. "Wannier exciton in microcrystals." Solid State Communications 59, no. 6 (August 1986): 405–8. http://dx.doi.org/10.1016/0038-1098(86)90573-9.

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3

Семина, М. А. "Тонкая структура ридберговских экситонов в закиси меди." Физика твердого тела 60, no. 8 (2018): 1515. http://dx.doi.org/10.21883/ftt.2018.08.46238.05gr.

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AbstractIn 1952, E.F. Gross and N.A. Karryev discovered excitons of big radius also called the Wannier–Mott excitons. Their energy spectrum, response to external electric and magnetic fields, and also elastic deformations of a crystal were extensively studied in the 1960s–1970s. The second wave of interest to excitons in Cu_2O crystals appeared comparatively recent, in 2014, after the “giant” highly excited exciton states had been observed in this material. A theoretical description of highly excited exciton states needs, as a rule, new approaches, because, for such states, a deviation from the exactly solved hydrogen-like model becomes substantial and a numerical solution of the Schrödinger equation with allowance made for the features of the crystal energy band structure becomes extremely resource consuming. This report is a brief review of recent theoretical and experimental studies of the fine structure of the exciton energy spectrum in copper protoxide.
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4

Mavroyannis, Constantine. "Charge transfer electron–exciton complexes in single crystals." Canadian Journal of Chemistry 63, no. 7 (July 1, 1985): 1345–48. http://dx.doi.org/10.1139/v85-229.

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We have considered the excitation spectrum arising from the coherent electron–exciton pairing in crystals at low temperatures. For the pairing processes, three different types of excitons have been considered: Frenkel excitons (tightly bound), Wannier–Mott excitons (loosely bound), and excitons of the intermediate binding. Expressions for the gap functions and transition temperatures at which metal-to-nonmetal phase transitions occur have been derived and discussed for each type of pairing. In the electron pairing with the intermediate exciton, the dispersion relations which determine the exciton and the electron–exciton modes are solved numerically and the derived results are graphically presented. The physical picture for the electron–exciton coupled modes is analogous to that for polaritons and magnon–phonon modes in crystals.
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5

HE, MENG-DONG, LING-LING WANG, WEI-QING HUANG, BING-SOU ZOU, and KE-QIU CHEN. "LOCALIZED WANNIER EXCITON IN DEFECT LAYER EMBEDDED BETWEEN TWO SEMI-INFINITE SUPERLATTICES." International Journal of Modern Physics B 24, no. 18 (July 20, 2010): 3501–11. http://dx.doi.org/10.1142/s0217979210052520.

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The characteristics of the localized Wannier exciton in defect layer (GaAs) embedded between two semi-infinite superlattices (GaAs/Al x Ga 1-x As ) are investigated theoretically using a variational approach. It can be clearly seen the exciton changes in character between three- and quasi-two-dimensional states from the variation of exciton binding energy, in-plane radius, and probability in the superlattices (SLs) growth direction. We find that the extensions of exciton in directions both parallel and perpendicular to the interface of SLs almost approach their minimums as the exciton binding energy reaches peak value at a certain defect width. Our results show that the binding energy of the ground exciton state is sensitive to Al concentration x in Al x Ga 1-x As and thicknesses of the constituent layers. The comparison between excitonic behavior in structural defect SLs and single quantum well is made.
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6

Postorino, Sara, Jianbo Sun, Saskia Fiedler, Laurent O. Lee Cheong Lem, Maurizia Palummo, and Luca Camilli. "Interlayer Bound Wannier Excitons in Germanium Sulfide." Materials 13, no. 16 (August 12, 2020): 3568. http://dx.doi.org/10.3390/ma13163568.

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We report a cathodoluminescence (CL) study of layered germanium sulfide (GeS) where we observe a sharp emission peak from flakes covered with a thin hexagonal boron nitride film. GeS is a material that has recently attracted considerable interest due to its emission in the visible region and its strong anisotropy. The measured CL peak is at ~1.69 eV for samples ranging in thickness from 97 nm to 45 nm, where quantum-confinement effects can be excluded. By performing ab initio ground- and excited-state simulations for the bulk compound, we show that the measured optical peak can be unambiguously explained by radiative recombination of the first free bright bound exciton, which is due to a mixing of direct transitions near the Γ-point of the Brillouin Zone and it is associated to a very large optical anisotropy. The analysis of the corresponding excitonic wave function shows a Wannier–Mott interlayer character, being spread not only in-plane but also out-of-plane.
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7

Khurgin, Jacob B. "Pliable polaritons: Wannier exciton-plasmon coupling in metal-semiconductor structures." Nanophotonics 8, no. 4 (November 20, 2018): 629–39. http://dx.doi.org/10.1515/nanoph-2018-0166.

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AbstractPlasmonic structures are known to support the modes with sub-wavelength volumes in which the field/matter interactions are greatly enhanced. Coupling between the molecular excitations and plasmons leading to the formation of “plexcitons” has been investigated for a number of organic molecules. However, plasmon-exciton coupling in metal/semiconductor structures has not experienced the same degree of attention. In this work, we show that the “very strong coupling” regime in which the Rabi energy exceeds the exciton binding energy is attainable in semiconductor-cladded plasmonic nanoparticles and leads to the formation of Wannier exciton-plasmon polariton (WEPP), which is bound to the metal nanoparticle and characterized by dramatically smaller (by a factor of a few) excitonic radius and correspondingly higher ionization energy. This higher ionization energy, which exceeding approaches 100 meV for the CdS/Ag structures, may make room-temperature Bose-Einstein condensation and polariton lasing in plasmonic/semiconductor structures possible.
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8

GÖPPERT, M., R. BECKER, C. MAIER, M. JÖRGER, A. JOLK, and C. KLINGSHIRN. "INFRARED ABSORPTION BY EXCITONS IN CUPROUS OXIDE." International Journal of Modern Physics B 15, no. 28n30 (December 10, 2001): 3615–18. http://dx.doi.org/10.1142/s0217979201008275.

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We report on the first observation of the 1s to 2p exciton transition in a direct gap semiconductor. Cuprous oxide is well known for its excitonic features which provide a model case for the theory of Wannier excitons. In our pump-probe experiment we measured the infrared transmission of cuprous oxide with the without Ar +-laser illumination. The observed photo-induced absorption line in the differential transmission spectra at 126 meV is assigned to the excitonic transition from 1s to 2p exciton levels i.e. to the analog of the Lyman series in atomic hydrogen. From the dependence of the integrated photo-induced absorption on the pump laser intensity we determine the lifetime of the paraexciton τ p ≈0.3 ms. We also studied the influence of the pump laser on the phonon absorption band in the mid-infrared. Its observed shift to lower energies with increasing pump laser intensity can be explained by heating of the samples.
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9

FAN, HONG-YI, HUI ZOU, YUE FAN, and QIU-YU LIU. "ENERGY SPECTRUM OF MOTT–WANNIER EXCITON STUDIED BY VIRTUE OF THE EXCITON ENTANGLED STATE REPRESENTATION INSTEAD OF K·P PERTURBATION THEORY." Modern Physics Letters B 19, no. 13n14 (June 20, 2005): 637–42. http://dx.doi.org/10.1142/s0217984905008645.

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We introduce the exciton entangled state. We show that the energy spectrum of Mott–Wannier exciton can be exactly derived by virtue of the entangled state representation. In contrast to the K · P perturbation theory this new approach seems non-perturbative, direct and exact.
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10

Ridene, Rym, Nouha Mastrour, Dhouha Gamra, and Habib Bouchriha. "Energetic behavior of excitons in hybrid organic–inorganic parabolic quantum dots and its electric field dependence." International Journal of Modern Physics B 29, no. 30 (November 18, 2015): 1550211. http://dx.doi.org/10.1142/s0217979215502112.

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In this paper, dispersion energies of Wannier–Mott, Frenkel and mixed exciton formation at the interface in nanocomposite organic–inorganic parabolic quantum dots are investigated theoretically taking account of the interaction between the two excitonic states and electric field effect. Illustration is given for three nanocomposites highly studied experimentally, such as organic P3HT combined respectively with inorganic (CdSe, ZnSe, ZnO) parabolic quantum dots. It is shown that the parameter governing the interaction between the individual exciton states depends on the inorganic quantum dot and can be controlled by the electric field. The results are consistent with the available experimental data.
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11

Schwermann, Christian, and Nikos L. Doltsinis. "Exciton transfer free energy from Car–Parrinello molecular dynamics." Physical Chemistry Chemical Physics 22, no. 19 (2020): 10526–35. http://dx.doi.org/10.1039/c9cp06419b.

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Free energies profiles for exciton transfer processes are calculated within ab initio molecular dynamics by applying restraining potentials to the Wannier centres of molecular orbitals corresponding to an electron-hole pair.
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12

Björk, Gunnar, Stanley Pau, Joseph Jacobson, and Yoshihisa Yamamoto. "Wannier exciton superradiance in a quantum-well microcavity." Physical Review B 50, no. 23 (December 15, 1994): 17336–48. http://dx.doi.org/10.1103/physrevb.50.17336.

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13

Королькова, К. А., В. Р. Новак, and А. В. Селькин. "Локализация экситона Ванье-Мотта на органополупроводниковом интерфейсе ленгмюровская пленка / CdS"." Физика твердого тела 61, no. 7 (2019): 1362. http://dx.doi.org/10.21883/ftt.2019.07.47852.390.

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Low temperature (T=2 K) optical reflection spectra have been studied for the organic-semiconductor structures prepared by deposition of Langmuir-Blodgett films on CdS surface. The spectra are measured in the resonant spectral range of the exciton state in CdS. Theoretical analysis of the spectra is carried out with an account of the spatial dispersion effects and the exciton-free surface “dead” layer. The conclusion has been drawn of the interface localization of the Wannier-Mott exciton due to organic film deposition on the crystal surface.
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14

Myasnikov, E. N., A. E. Druzhinin, and A. P. Popov. "On participation of medium oscillations in wannier exciton motion." physica status solidi (b) 134, no. 2 (April 1, 1986): 651–58. http://dx.doi.org/10.1002/pssb.2221340224.

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15

Pokatilov, E. P., S. I. Beril, V. M. Fomin, and G. A. Pogorilko. "Wannier-Mott Exciton States in Two-Layer Periodic Structures." physica status solidi (b) 130, no. 2 (August 1, 1985): 619–28. http://dx.doi.org/10.1002/pssb.2221300225.

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16

RAJASHABALA, S., S. S. KANMANI, and K. NAVANEETHAKRISHNAN. "LASER INDUCED METAL INSULATOR TRANSITION THROUGH EXCITON MECHANISM IN QUANTUM WELL SYSTEMS." Modern Physics Letters B 23, no. 09 (April 10, 2009): 1229–42. http://dx.doi.org/10.1142/s0217984909019223.

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Within the effective mass approximation, the binding energies of a Wannier exciton in a GaAs-Ga 1-x Al x As quantum well in an electric field are investigated using a variational method. The binding energiesare obtained upon illlumination by laser radiation. The binding energy decreases as the well size increases when the size of the well is beyond 50 Å. The above behavior is for a quantum well of finite confinement. We have investigated the metal-insulator transition in such a system and report the values of critical concentrations of excitons at which metal-insulator transition occurs for different well dimensions. The calculated diamagnetic susceptibility shows the catastrophic behavior at the critical concentration.
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17

Dietrich, Christof P., Anja Steude, Laura Tropf, Marcel Schubert, Nils M. Kronenberg, Kai Ostermann, Sven Höfling, and Malte C. Gather. "An exciton-polariton laser based on biologically produced fluorescent protein." Science Advances 2, no. 8 (August 2016): e1600666. http://dx.doi.org/10.1126/sciadv.1600666.

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Under adequate conditions, cavity polaritons form a macroscopic coherent quantum state, known as polariton condensate. Compared to Wannier-Mott excitons in inorganic semiconductors, the localized Frenkel excitons in organic emitter materials show weaker interaction with each other but stronger coupling to light, which recently enabled the first realization of a polariton condensate at room temperature. However, this required ultrafast optical pumping, which limits the applications of organic polariton condensates. We demonstrate room temperature polariton condensates of cavity polaritons in simple laminated microcavities filled with biologically produced enhanced green fluorescent protein (eGFP). The unique molecular structure of eGFP prevents exciton annihilation even at high excitation densities, thus facilitating polariton condensation under conventional nanosecond pumping. Condensation is clearly evidenced by a distinct threshold, an interaction-induced blueshift of the condensate, long-range coherence, and the presence of a second threshold at higher excitation density that is associated with the onset of photon lasing.
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18

Vragović, Igor, R. Scholz, and J. P. Šetrajčić. "Optical Properties of PTCDA Bulk Crystals and Ultrathin Films." Materials Science Forum 518 (July 2006): 41–46. http://dx.doi.org/10.4028/www.scientific.net/msf.518.41.

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Thin films and interfaces of crystalline organic dyes with semiconducting properties attracted a lot of attention in the last decade due to their numerous applications in electronics and optoelectronics. One of the most studied molecules is 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA); an archetypal organic material that can grow into multilayer films. Despite the great interest and intensive investigations, its optical properties are still not completely understood. The interpretations range from the Wannier-Mott exciton model to models of excitons of small radii. In the present work, we apply the Frenkel exciton model in order to describe the optical behavior of the solid phase of PTCDA, influenced by the transfer of excitations between different molecules. We are able to model the anisotropy of dielectric tensor, lineshape of the complex index of refraction, exciton dispersion and the large Stokes shift between absorption and photoluminescence, results of electron-energy loss spectroscopy, and photoluminescence transition energies and decay times. In addition, we made an extension of the model towards ultrathin PTCDA films.
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19

Saito, Noriko, and Yosuke Kayanuma. "Resonant Tunneling of a Wannier Exciton through a Single Heterobarrier." Japanese Journal of Applied Physics 34, S1 (January 1, 1995): 77. http://dx.doi.org/10.7567/jjaps.34s1.77.

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20

Pokutnyi, S. I., M. H. Tyc, W. Salejda, and J. Misiewicz. "Two-dimensional Wannier-Mott exciton in a uniform electric field." Physics of the Solid State 43, no. 5 (May 2001): 923–26. http://dx.doi.org/10.1134/1.1371378.

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21

Chen, Y. N., and D. S. Chuu. "Decay rate of a Wannier exciton in low-dimensional systems." Europhysics Letters (EPL) 54, no. 3 (May 2001): 366–72. http://dx.doi.org/10.1209/epl/i2001-00251-7.

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22

Birman, Joseph L., and Nguyen Que Huong. "Wannier–Frenkel hybrid exciton in organic–semiconductor quantum dot heterostructures." Journal of Luminescence 125, no. 1-2 (July 2007): 196–200. http://dx.doi.org/10.1016/j.jlumin.2006.08.030.

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23

Lu, N. H., P. M. Hui, and T. M. Hsu. "Wannier exciton binding energies in GaAs/AlxGa1-xAs quantum wells." Solid State Communications 78, no. 2 (April 1991): 145–48. http://dx.doi.org/10.1016/0038-1098(91)90271-v.

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24

Ercelebi, A., and U. Ozdincer. "Polaron properties of the Wannier exciton in a quantum well confinement." Journal of Physics: Condensed Matter 1, no. 11 (March 20, 1989): 1999–2007. http://dx.doi.org/10.1088/0953-8984/1/11/007.

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25

Boichuk, V. I., and I. V. Bilynskii. "Bound energy of the Wannier exciton in similar heterogeneous double structures." physica status solidi (b) 174, no. 2 (December 1, 1992): 463–70. http://dx.doi.org/10.1002/pssb.2221740215.

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26

Saito, Noriko, and Yosuke Kayanuma. "Resonant tunneling of a Wannier exciton through a single-barrier heterostructure." Physical Review B 51, no. 8 (February 15, 1995): 5453–56. http://dx.doi.org/10.1103/physrevb.51.5453.

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27

Mollet, Christian, Angela Kunoth, and Torsten Meier. "Excitonic Eigenstates of Disordered Semiconductor Quantum Wires: Adaptive Wavelet Computation of Eigenvalues for the Electron-Hole Schrödinger Equation." Communications in Computational Physics 14, no. 1 (July 2013): 21–47. http://dx.doi.org/10.4208/cicp.081011.260712a.

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AbstractA novel adaptive approach to compute the eigenenergies and eigenfunctions of the two-particle (electron-hole) Schrödinger equation including Coulomb attraction is presented. As an example, we analyze the energetically lowest exciton state of a thin one-dimensional semiconductor quantum wire in the presence of disorder which arises from the non-smooth interface between the wire and surrounding material. The eigenvalues of the corresponding Schrödinger equation, i.e., the one-dimensional exciton Wannier equation with disorder, correspond to the energies of excitons in the quantum wire. The wavefunctions, in turn, provide information on the optical properties of the wire.We reformulate the problem of two interacting particles that both can move in one dimension as a stationary eigenvalue problem with two spacial dimensions in an appropriate weak form whose bilinear form is arranged to be symmetric, continuous, and coercive. The disorder of the wire is modelled by adding a potential in the Hamiltonian which is generated by normally distributed random numbers. The numerical solution of this problem is based on adaptive wavelets. Our scheme allows for a convergence proof of the resulting scheme together with complexity estimates. Numerical examples demonstrate the behavior of the smallest eigenvalue, the ground state energies of the exciton, together with the eigenstates depending on the strength and spatial correlation of disorder.
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28

Plehn, Thomas, Dirk Ziemann, and Volkhard May. "Simulations of Frenkel to Wannier–Mott Exciton Transitions in a Nanohybrid System." Journal of Physical Chemistry C 122, no. 49 (November 14, 2018): 27925–34. http://dx.doi.org/10.1021/acs.jpcc.8b09697.

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29

Chalbaud, E. R., and J. P. Gallinar. "Wannier Stark ladders in the optical absorption spectrum of a 'Hubbard exciton'." Journal of Physics: Condensed Matter 1, no. 21 (May 29, 1989): 3325–36. http://dx.doi.org/10.1088/0953-8984/1/21/003.

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30

Chen, Yueh-Nan, and Der-San Chuu. "Renormalized frequency shift of a Wannier exciton in a one-dimensional system." Physics Letters A 324, no. 1 (April 2004): 86–90. http://dx.doi.org/10.1016/j.physleta.2004.02.054.

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31

Taguchi, Satoshi, Takenari Goto, Masayasu Takeda, and Giyuu Kido. "Magneto-Optical Effects of the Wannier Exciton in a Biaxial ZnP2Crystal. I." Journal of the Physical Society of Japan 57, no. 9 (September 15, 1988): 3256–61. http://dx.doi.org/10.1143/jpsj.57.3256.

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32

Goto, Takenari, Satoshi Taguchi, Yasushi Nagamune, Shojiro Takeyama, and Noboru Miura. "Magneto-Optical Effect of the Wannier Exciton in a Biaxial ZnP2Crystal. II." Journal of the Physical Society of Japan 58, no. 10 (October 15, 1989): 3822–27. http://dx.doi.org/10.1143/jpsj.58.3822.

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33

Goto, Takenari, Satoshi Taguchi, Kikuo Cho, Yasushi Nagamune, Shojiro Takeyama, and Noboru Miura. "Magneto-Optical Effect of the Wannier Exciton in a Biaxial ZnP2Crystal. III." Journal of the Physical Society of Japan 59, no. 2 (February 15, 1990): 773–78. http://dx.doi.org/10.1143/jpsj.59.773.

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34

Vertsimakha, G. V. "Variational approach to the calculation of the lowest Wannier exciton state in wide type-II single semiconductor quantum wells." Semiconductor Physics Quantum Electronics and Optoelectronics 19, no. 2 (July 6, 2016): 208–14. http://dx.doi.org/10.15407/spqeo19.02.208.

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35

Reyes, J. A., and M. del Castillo-Mussot. "Wannier-Mott exciton formed by electron and hole separated in parallel quantum wires." Physical Review B 57, no. 3 (January 15, 1998): 1690–97. http://dx.doi.org/10.1103/physrevb.57.1690.

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36

Hino, Ken-ichi, and Nobuyuki Toshima. "Dimensionality transitions of exciton Fano resonance spectra in a semiconductor Wannier–Stark ladder." Solid State Communications 135, no. 1-2 (July 2005): 119–23. http://dx.doi.org/10.1016/j.ssc.2005.03.042.

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37

Yu, Junhong, Songyan Hou, Manoj Sharma, Landobasa Y. M. Tobing, Zhigang Song, Savas Delikanli, Chathuranga Hettiarachchi, et al. "Strong Plasmon-Wannier Mott Exciton Interaction with High Aspect Ratio Colloidal Quantum Wells." Matter 2, no. 6 (June 2020): 1550–63. http://dx.doi.org/10.1016/j.matt.2020.03.013.

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38

Plekhanov, V. G. "Isotope-induced energy-spectrum renormalization of the Wannier-Mott exciton in LiH crystals." Physical Review B 54, no. 6 (August 1, 1996): 3869–77. http://dx.doi.org/10.1103/physrevb.54.3869.

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39

Lo, C. F., and R. Sollie. "Mass dependence of ground-state properties of Wannier exciton in a quantum dot." Solid State Communications 79, no. 9 (September 1991): 775–78. http://dx.doi.org/10.1016/0038-1098(91)90794-v.

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40

Kobayashi, Hajime, Shinnosuke Hattori, Raku Shirasawa, and Shigetaka Tomiya. "Wannier-Like Delocalized Exciton Generation in C60 Fullerene Clusters: A Density Functional Theory Study." Journal of Physical Chemistry C 124, no. 4 (January 6, 2020): 2379–87. http://dx.doi.org/10.1021/acs.jpcc.9b10703.

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41

Hino, Ken-ichi, and Nobuyuki Toshima. "Anomalous variation of the exciton Fano-resonance spectra in strongly biased Wannier–Stark ladder." Solid State Communications 132, no. 7 (November 2004): 449–53. http://dx.doi.org/10.1016/j.ssc.2004.08.025.

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42

Zhirko, Yu I. "On Wannier exciton 2D localization in hydrogen intercalated InSe and GaSe layered semiconductor crystals." Semiconductor Physics, Quantum Electronics and Optoelectronics 7, no. 4 (December 16, 2004): 404–10. http://dx.doi.org/10.15407/spqeo7.04.404.

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43

Pokatilov, E. P., S. I. Beril, V. M. Fomin, V. G. Litovchenko, D. V. Korbutyak, E. G. Lashkevich, and E. V. Mikhailovskaya. "The Size-Quantized States of the Wannier-Mott Exciton in Structures with Superthin Films." physica status solidi (b) 145, no. 2 (February 1, 1988): 535–44. http://dx.doi.org/10.1002/pssb.2221450219.

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44

Korolkova, K. A., V. R. Novak, and A. V. Sel’kin. "Localization of the Wannier–Mott Exciton on a Langmuir-Film/CdS Organic Semiconductor Interface." Physics of the Solid State 61, no. 7 (July 2019): 1304–9. http://dx.doi.org/10.1134/s1063783419070175.

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45

Deng, Zhen-Yan. "Binding energies of a hydrogenic impurity and of a Wannier exciton in an arbitrary corner structure." Journal of Physics: Condensed Matter 8, no. 40 (September 30, 1996): 7443–51. http://dx.doi.org/10.1088/0953-8984/8/40/009.

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46

Pokatilov, E. P., S. I. Beril, V. M. Fomin, and V. V. Kalinovskii. "The Size-Quantized States of the Wannier-Mott Exciton in Structures with Superthin Films of CdTe." physica status solidi (b) 161, no. 2 (October 1, 1990): 603–12. http://dx.doi.org/10.1002/pssb.2221610215.

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47

Rosam, B., K. Leo, L. Yang, and M. M. Dignam. "Terahertz generation by difference-frequency mixing of exciton Wannier–Stark ladder states in biased semiconductor superlattices." Applied Physics Letters 85, no. 20 (November 15, 2004): 4612–14. http://dx.doi.org/10.1063/1.1819508.

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48

Gerlach, B., and H. Löwen. "Analytical properties of a (Wannier) exciton-phonon system: On the exclusion of self-trapping and overscreening." Physical Review B 42, no. 6 (August 15, 1990): 3537–45. http://dx.doi.org/10.1103/physrevb.42.3537.

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Lo, C. F., and R. Sollie. "The mass dependence of the ground-state properties of the Wannier exciton in a quantum box." Journal of Physics: Condensed Matter 5, no. 45 (November 8, 1993): 8587–94. http://dx.doi.org/10.1088/0953-8984/5/45/011.

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Romdhane, S., S. Jaziri, H. Bouchriha, and R. Bennaceur. "Frenkel-Wannier-Mott Exciton States in Organic–Inorganic Semiconductor Quantum Wells Subjected to a Magnetic Field." physica status solidi (a) 164, no. 1 (November 1997): 335–38. http://dx.doi.org/10.1002/1521-396x(199711)164:1<335::aid-pssa335>3.0.co;2-x.

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