Influence of correlations in a flat distribution of impurity ions on the mobility of two-dimensional electrons at low temperatures

2012 ◽  
Vol 54 (7) ◽  
pp. 1451-1458 ◽  
Author(s):  
V. M. Mikheev
Keyword(s):  
Low Temperatures ◽  
Two Dimensional ◽  
Impurity Ions ◽  
Flat Distribution

Specific heat of ordered and isotopically disordered lattices

1978 ◽  
Vol 56 (10) ◽  
pp. 1390-1394
Author(s):  
K. P. Srivastava
Keyword(s):  
Specific Heat ◽  
Low Temperatures ◽  
Numerical Study ◽  
Three Dimensional ◽  
Constant Volume ◽  
Nearest Neighbour ◽  
Two Dimensional ◽  
Appreciable Difference ◽  
Substantial Change ◽  
Neighbour Interaction

An extensive numerical study on specific heat at constant volume (Cv) for ordered and isotopically disordered lattices has been made. Cv at various temperatures for ordered and disordered linear and two-dimensional lattices have been compared and no appreciable difference in Cv between these two structures has been observed. Effect of concentration of light atoms on Cv for three-dimensional isotopically disordered lattices has also been shown.In spite of taking next-nearest-neighbour interaction into account, no substantial change in Cv between the ordered and isotopically disordered linear lattices has been found. It is shown that the low lying modes contribute substantially at low temperatures.

Magnetic susceptibility ofNdGaO3at low temperatures: A quasi-two-dimensional Ising behavior

1998 ◽  
Vol 58 (2) ◽  
pp. 798-804 ◽  
Author(s):  
F. Luis ◽  
M. D. Kuz’min ◽  
F. Bartolomé ◽  
V. M. Orera ◽  
J. Bartolomé ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Low Temperatures ◽  
Two Dimensional

A crossover from Efros–Shklovskii hopping to activated transport in a GaAs two-dimensional hole system at low temperatures

2021 ◽  
Vol 42 (5) ◽  
pp. 052001
Author(s):  
S. Dlimi ◽  
A. El kaaouachi ◽  
L. Limouny ◽  
B. A. Hammou
Keyword(s):  
Low Temperatures ◽  
Two Dimensional

Optical Measurements of Correlated States of Two Dimensional Electrons in GaAs at Low Temperatures and High Magnetic Fields

1991 ◽  
Vol T39 ◽  
pp. 223-229 ◽  
Author(s):  
J F Ryan ◽  
R G Clark ◽  
R A Ford ◽  
C T Foxon ◽  
J J Harris ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Low Temperatures ◽  
Optical Measurements ◽  
High Magnetic Fields ◽  
Two Dimensional

Electron Tunneling Between Si Quantum Dots and Two Dimensional Electron Gas under Optical Excitation at Low Temperatures

2019 ◽  
Vol 28 (1) ◽  
pp. 369-374
Author(s):  
Yoko Sakurai ◽  
Yukihiro Takada ◽  
Juin-Ichi Iwata ◽  
Kenji Shiraishi ◽  
Shintaro Nomura ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Low Temperatures ◽  
Electron Tunneling ◽  
Electron Gas ◽  
Optical Excitation ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas ◽  
Si Quantum Dots

scholarly journals A “Pushy” Microscope

1996 ◽  
Vol 4 (2) ◽  
pp. 3-4
Author(s):  
Stephen W. Carmichael
Keyword(s):  
Scanning Tunneling Microscope ◽  
Low Temperatures ◽  
Research Laboratory ◽  
Room Temperature ◽  
Scientific Research ◽  
Thermal Motion ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Tunneling Microscope ◽  
Dimensional Surface

The process of ultra-miniaturization has been termed nanofabrication. It looks like the scanning tunneling microscope (STU) and related microscopes will be players in this technology of the future. One of the most recent contributions has been the demonstration that single molecules can be “pushed” across a surface with the STM. This remarkable achievement was demonstrated by Thomas Jung, Reto Schlittler, and James Gimzewski of the IBM Zurich Research Laboratory and Hao Tang and Christian Joachim of the National Center for Scientific Research in Toulouse, They were able to position intact individual molecules on a two-dimensional surface at room temperature by a controlled “pushing” action of the tip of a STM. Similar positioning feats have been done at low temperatures while thermal motion is limited.

Effect of the Inter-Subband Scattering in Modulation-Doped AlxGa1-xN/GaN Heterostructures

2001 ◽  
Vol 693 ◽  
Author(s):  
Z. W. Zheng ◽  
B. Shen ◽  
C. P. Jiang ◽  
S. L. Guo ◽  
J. Liu ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Low Temperatures ◽  
Strain Relaxation ◽  
Electron Gas ◽  
High Magnetic Fields ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas ◽  
Increasing Temperature

AbstractMagnetotransport properties of Al0.22Ga0.78N/GaN modulation-doped heterostructures have been studied at low temperatures and high magnetic fields. The inter-subband scattering of the two-dimensional electron gas was observed. The inter-subband scattering is very weak and depends weakly on temperature when temperature is between 1.3 K and 10 K and becomes stronger with increasing temperature when temperature is higher than 10 K. The strain relaxation of the Al0.22Ga0.78N layer influences the inter-subband scattering. It is suggested that the inter-subband scattering is dominant by the elastic scattering when temperature is lower than 10 K, and changes to be dominant by the inelastic scattering of the acoustic phonons when temperature is higher than 10 K.

scholarly journals Anomalous spin correlations and excitonic instability of interacting 2D Weyl fermions

Science ◽  
2017 ◽  
Vol 358 (6369) ◽  
pp. 1403-1406 ◽  
Author(s):  
Michihiro Hirata ◽  
Kyohei Ishikawa ◽  
Genki Matsuno ◽  
Akito Kobayashi ◽  
Kazuya Miyagawa ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Nmr Relaxation ◽  
Spin Fluctuations ◽  
Two Dimensional ◽  
Marked Contrast ◽  
Metallic Behavior ◽  
Model Calculations ◽  
Spin Correlations ◽  
Zero Momentum ◽  
Weyl Fermions

The Coulomb interaction in systems of quasi-relativistic massless electrons has an unscreened long-range component at variance with conventional correlated metals. We used nuclear magnetic resonance (NMR) measurements to reveal unusual spin correlations of two-dimensional Weyl fermions in an organic material, causing a divergent increase of the Korringa ratio by a factor of 1000 upon cooling, in marked contrast to conventional metallic behavior. Combined with model calculations, we show that this divergence stems from an interaction-driven velocity renormalization that almost exclusively suppresses zero-momentum spin fluctuations. At low temperatures, the NMR relaxation rate shows an unexpected increase; numerical analyses show that this increase corresponds to internode excitonic fluctuations, a precursor to a transition from massless to massive quasiparticles.

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