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Journal articles on the topic 'Milli-Kelvin temperaturer'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Merenkov, Alexey V., Vladimir I. Chichkov, Andrey B. Ermakov, Alexey V. Ustinov, and Sergey V. Shitov. "Superconducting RFTES Detector at Milli-Kelvin Temperatures." IEEE Transactions on Applied Superconductivity 28, no. 7 (2018): 1–5. http://dx.doi.org/10.1109/tasc.2018.2827981.

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2

Legl, S., C. Pfleiderer, and K. Krämer. "Vibrating coil magnetometer for milli-Kelvin temperatures." Review of Scientific Instruments 81, no. 4 (2010): 043911. http://dx.doi.org/10.1063/1.3374557.

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3

Waard, A. de, L. Gottardi, M. Bassan, et al. "Cooling down MiniGRAIL to milli-Kelvin temperatures." Classical and Quantum Gravity 21, no. 5 (2004): S465—S471. http://dx.doi.org/10.1088/0264-9381/21/5/012.

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4

Shinjo, Teruya. "Mössbauer studies at Milli-Kelvin temperature region." Hyperfine Interactions 42, no. 1-4 (1988): 1173–76. http://dx.doi.org/10.1007/bf02395600.

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5

Jain, F., R. H. Gudlavalleti, R. Mays, B. Saman, J. Chandy, and E. Heller. "Modeling of Quantum Dot Channel (QDC) Si FETs at Sub-Kelvin for Multi-State Logic." International Journal of High Speed Electronics and Systems 29, no. 01n04 (2020): 2040017. http://dx.doi.org/10.1142/s0129156420400170.

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Multi-state room temperature operation of SiOx-cladded Si quantum dots (QD) and GeOx-cladded Ge quantum dot channel (QDC) field-effect transistors (FETs) and spatial wavefunction switched (SWS)-FETs have been experimentally demonstrated. This paper presents simulation of cladded Si and Ge quantum dot channel (QDC) field-effect transistors at 4.2°K and milli-Kelvin temperatures. An array of thin oxide barrier/cladding (∼1nm) on quantum dots forms a quantum dot superlattice (QDSL). A gradual channel approximation model using potential and inversion layer charge density nQM, obtained by the self-consistent solution of the Schrodinger and Poisson’s equations, is shown to predict I-V characteristics up to milli-Kelvin temperatures. Physics-based equivalent circuit models do not work below 53°K. However, they may be improved by adapting parameters derived from quantum simulations. Low-temperature operation improves noise margins in QDC- and SWS-FET based multi-bit logic, which dissipates lower power and comprise of fewer device count. In addition, the role of self-assembled cladded QDs with transfer gate provides a novel pathway to implement qubit processing.

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6

Hepburn, I. D., and A. Smith. "Milli-Kelvin refrigeration in space for low temperature detectors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 370, no. 1 (1996): 276–78. http://dx.doi.org/10.1016/0168-9002(95)01128-5.

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7

Amann, Andreas, Manivannan Nallaiyan, Luis Montes, Alan Wilson, and Stefano Spagna. "Fully Automated AC Susceptometer for Milli-Kelvin Temperatures in a DynaCool PPMS." IEEE Transactions on Applied Superconductivity 27, no. 4 (2017): 1–4. http://dx.doi.org/10.1109/tasc.2016.2639480.

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8

Pilla, S., B. Naberhuis, and J. Goodkind. "A porous silicon diode as a source of low-energy free electrons at milli-Kelvin temperatures." Journal of Applied Physics 98, no. 2 (2005): 024508. http://dx.doi.org/10.1063/1.1988972.

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9

Herrmannsd�rfer, T., S. Rehmann, and F. Pobell. "Magnetic properties of highly dilutedPdFex andPtFex-alloys. Part II. Susceptibility at micro- and milli-kelvin temperatures." Journal of Low Temperature Physics 104, no. 1-2 (1996): 67–94. http://dx.doi.org/10.1007/bf00754090.

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10

Musso, M., F. Matthai, D. Keutel, and K. L. Oehme. "Critical Raman line shape behavior of fluid nitrogen." Pure and Applied Chemistry 76, no. 1 (2004): 147–55. http://dx.doi.org/10.1351/pac200476010147.

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Isotropic Raman line shapes of simple molecular fluids exhibit critical line broadening near their respective liquid-gas critical points. In order to observe this phenomenon, it is essential that the band position of a given vibrational mode is density-dependent, and that vibrational depopulation processes negligibly contribute to line broadening. Special attention was given to the fact that the isotropic (i.e., nonrotationally broadened) line shape of liquid N2 is affected by resonant intermolecular vibrational interactions between identical oscillators. By means of the well-chosen isotopic mixture (14N2).975 - (14N15N).025, the temperature and density dependences of shift, width, and asymmetry of the resonantly coupled 14N2 and, depending on the S/N ratio available, of the resonantly uncoupled 14N15N were determined, with up to milli-Kelvin resolution, in the coexisting liquid and gas phases and along the critical isochore, using a highest-resolution double monochromator and modern charge-coupled device detection techniques. Clear evidence was found that vibrational resonance couplings are present in all dense phases studied.

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11

Clow, Gary D., Richard W. Saltus, and Edwin D. Waddington. "A new high-precision borehole-temperature logging system used at GISP2, Greenland, and Taylor Dome, Antarctica." Journal of Glaciology 42, no. 142 (1996): 576–84. http://dx.doi.org/10.1017/s0022143000003555.

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AbstractWe describe a high-precision (0.1–1.0 mK) borehole-temperature (BT) logging system developed at the United States Geological Survey (USGS) for use in remote polar regions. We discuss calibration, operational and data-processing procedures, and present an analysis of the measurement errors. The system is modular to facilitate calibration procedures and field repairs. By interchanging logging cables and temperature sensors, measurements can be made in either shallow air-filled boreholes or liquid-filled holes up to 7 km deep. Data can be acquired in either incremental or continuous-logging modes. The precision of data collected by the new logging system is high enough to detect and quantify various thermal effects at the milli-Kelvin level. To illustrate this capability, we present sample data from the 3 km deep borehole at GISP2, Greenland, and from a 130 m deep air-filled hole at Taylor Dome, Antarctica. The precision of the processed GISP2 continuous temperature logs is 0.25–0.34 mK, while the accuracy is estimated to be 4.5 mK. The effects of fluid convection and the dissipation of the thermal disturbance caused by drilling the borehole are clearly visible in the data. The precision of the incremental Taylor Dome measurements varies from 0.11 to 0.32 mK. depending on the wind strength during the experiments. With this precision, we found that temperature fluctuations and multi-hour trends in the BT measurements correlate well with atmospheric-pressure changes.

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12

Clow, Gary D., Richard W. Saltus, and Edwin D. Waddington. "A new high-precision borehole-temperature logging system used at GISP2, Greenland, and Taylor Dome, Antarctica." Journal of Glaciology 42, no. 142 (1996): 576–84. http://dx.doi.org/10.3189/s0022143000003555.

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AbstractWe describe a high-precision (0.1–1.0 mK) borehole-temperature (BT) logging system developed at the United States Geological Survey (USGS) for use in remote polar regions. We discuss calibration, operational and data-processing procedures, and present an analysis of the measurement errors. The system is modular to facilitate calibration procedures and field repairs. By interchanging logging cables and temperature sensors, measurements can be made in either shallow air-filled boreholes or liquid-filled holes up to 7 km deep. Data can be acquired in either incremental or continuous-logging modes. The precision of data collected by the new logging system is high enough to detect and quantify various thermal effects at the milli-Kelvin level. To illustrate this capability, we present sample data from the 3 km deep borehole at GISP2, Greenland, and from a 130 m deep air-filled hole at Taylor Dome, Antarctica. The precision of the processed GISP2 continuous temperature logs is 0.25–0.34 mK, while the accuracy is estimated to be 4.5 mK. The effects of fluid convection and the dissipation of the thermal disturbance caused by drilling the borehole are clearly visible in the data. The precision of the incremental Taylor Dome measurements varies from 0.11 to 0.32 mK. depending on the wind strength during the experiments. With this precision, we found that temperature fluctuations and multi-hour trends in the BT measurements correlate well with atmospheric-pressure changes.

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13

Emery, V. J. "Perspectives on the Theory of the New High Tc Superconducting Oxides." MRS Bulletin 14, no. 1 (1989): 67–71. http://dx.doi.org/10.1557/s088376940005394x.

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There is a widespread feeling that the discovery of high temperature superconductors will force us to change our way of thinking about superconductivity in solids. It has steadily emerged that the simple free-electron picture is inadequate, that a new mechanism of superconductivity is most likely at work, and that modifications (if not outright revisions of the many-body theory) are needed. The situation is not entirely without precedent: much the same could have been said of superfluidity in liquid He. That, however, did not cause such a stir: it had been anticipated some 12 years before its eventual discovery, and the transition temperature of liquid He is so low that experiments have been confined to the few laboratories around the world with a milli-kelvin capability. Finally, the normal state of He was already wellunderstood, so that theorists were poised and ready to tackle the problems posed by the superfluid.Contrast the oxides. Even the rather extensive earlier studies of Ba1-x PbxBiO3 and other superconducting oxides did not prepare us for the advances of the past two years. Laboratories all over the world have been able to prepare and study the new superconductors rather easily, although well-characterized samples and incisive experiments have not been so easy to come by. The flood of new information poses a particular challenge for condensed matter theory — to distil the essence of these complicated multicomponent materials and to explain how the genie of high temperature superconductivity has escaped after so many years. Despite the existing understanding of the properties of oxides, much work remains to be done before we have a good grip on the many-body theory of these strongly correlated systems.

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14

Tokiwa, Yoshifumi, Sebastian Bachus, Kavita Kavita, Anton Jesche, Alexander A. Tsirlin, and Philipp Gegenwart. "Frustrated magnet for adiabatic demagnetization cooling to milli-Kelvin temperatures." Communications Materials 2, no. 1 (2021). http://dx.doi.org/10.1038/s43246-021-00142-1.

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AbstractGeneration of very low temperatures has been crucially important for applications and fundamental research, as low-temperature quantum coherence enables operation of quantum computers and formation of exotic quantum states, such as superfluidity and superconductivity. One of the major techniques to reach milli-Kelvin temperatures is adiabatic demagnetization refrigeration. This method uses almost non-interacting magnetic moments of paramagnetic salts where large distances suppress interactions between the moments. The large spatial separations are facilitated by water molecules, with a drawback of reduced stability of the material. Here, we show that the water-free frustrated magnet KBaYb(BO3)2 can be ideal for refrigeration, achieving at least 22 mK. Compared to conventional refrigerants, KBaYb(BO3)2 does not degrade even under high temperatures and ultra-high vacuum. Further, its magnetic frustration and structural randomness enable cooling to temperatures several times lower than the energy scale of magnetic interactions, which is the main limiting factor for the base temperature of conventional refrigerants.

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15

Krey, C., S. Legl, S. R. Dunsiger, et al. "First Order Metamagnetic Transition inHo2Ti2O7Observed by Vibrating Coil Magnetometry at Milli-Kelvin Temperatures." Physical Review Letters 108, no. 25 (2012). http://dx.doi.org/10.1103/physrevlett.108.257204.

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16

Alenkov, V., H. W. Bae, J. Beyer, et al. "First results from the AMoRE-Pilot neutrinoless double beta decay experiment." European Physical Journal C 79, no. 9 (2019). http://dx.doi.org/10.1140/epjc/s10052-019-7279-1.

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Abstract The advanced molybdenum-based rare process experiment (AMoRE) aims to search for neutrinoless double beta decay ($$0\nu \beta \beta $$0νββ) of $$^{100}$$100Mo with $$\sim 100\,\hbox {kg}$$∼100kg of $$^{100}$$100Mo-enriched molybdenum embedded in cryogenic detectors with a dual heat and light readout. At the current, pilot stage of the AMoRE project we employ six calcium molybdate crystals with a total mass of 1.9 kg, produced from $$^{48}$$48Ca-depleted calcium and $$^{100}$$100Mo-enriched molybdenum ($$^{48{{\text {depl}}}}\hbox {Ca}^{100}\hbox {MoO}_{4}$$48deplCa100MoO4). The simultaneous detection of heat (phonon) and scintillation (photon) signals is realized with high resolution metallic magnetic calorimeter sensors that operate at milli-Kelvin temperatures. This stage of the project is carried out in the Yangyang underground laboratory at a depth of 700 m. We report first results from the AMoRE-Pilot $$0\nu \beta \beta $$0νββ search with a 111 kg day live exposure of $$^{48{{\text {depl}}}}\hbox {Ca}^{100}\hbox {MoO}_{4}$$48deplCa100MoO4 crystals. No evidence for $$0\nu \beta \beta $$0νββ decay of $$^{100}$$100Mo is found, and a upper limit is set for the half-life of $$0\nu \beta \beta $$0νββ of $$^{100}$$100Mo of $$T^{0\nu }_{1/2} > 9.5\times 10^{22}~\hbox {years}$$T1/20ν>9.5×1022years at 90% C.L. This limit corresponds to an effective Majorana neutrino mass limit in the range $$\langle m_{\beta \beta }\rangle \le (1.2-2.1)\,\hbox {eV}$$⟨mββ⟩≤(1.2-2.1)eV.

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