scholarly journals Identifying the Dirac point composition in Bi1−xSbx alloys using the temperature dependence of quantum oscillations

2021 ◽  
Vol 130 (22) ◽  
pp. 225106
Author(s):  
Joon Sang Kang ◽  
Dung Vu ◽  
Joseph P. Heremans
Keyword(s):  
Temperature Dependence ◽  
Dirac Point ◽  
Quantum Oscillations ◽  
Point Composition

scholarly journals Influence of Pressure on the Temperature Dependence of Quantum Oscillation Phenomena in Semiconductors

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
G. Gulyamov ◽  
U. I. Erkaboev ◽  
A. G. Gulyamov
Keyword(s):  
Experimental Data ◽  
Hydrostatic Pressure ◽  
Temperature Dependence ◽  
Band Gap ◽  
Landau Levels ◽  
Quantum Oscillation ◽  
Quantum Oscillations ◽  
Effect Of Pressure ◽  
Calculation Results

The influence of pressure on the oscillations of Shubnikov-de Haas (ShdH) and de Haas-van Alphen (dHvA) in semiconductors is studied. Working formula for the calculation of the influence of hydrostatic pressure on the Landau levels of electrons is obtained. The temperature dependence of quantum oscillations for different pressures is determined. The calculation results are compared with experimental data. It is shown that the effect of pressure on the band gap is manifested to oscillations and ShdH and dHvA effects in semiconductors.

Temperature dependence of hybrid quantum oscillations

1984 ◽  
Vol 50 (7) ◽  
pp. 661-663 ◽  
Author(s):  
M. Nealon ◽  
R.E. Doezema
Keyword(s):  
Temperature Dependence ◽  
Quantum Oscillations

scholarly journals Dirac point induced ultralow-threshold laser and giant optoelectronic quantum oscillations in graphene-based heterojunctions

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Golam Haider ◽  
Rini Ravindranath ◽  
Tzu-Pei Chen ◽  
Prathik Roy ◽  
Pradip Kumar Roy ◽  
...  
Keyword(s):  
Dirac Point ◽  
Quantum Oscillations

scholarly journals Origin of the temperature dependence of the energy gap in Cr-doped Bi2Se3

2018 ◽  
Vol 20 (13) ◽  
pp. 8624-8628 ◽  
Author(s):  
Turgut Yilmaz ◽  
William Hines ◽  
Shoroog Alraddadi ◽  
Joseph I. Budnick ◽  
Boris Sinkovic
Keyword(s):  
Temperature Dependence ◽  
Topological Insulators ◽  
Recent Progress ◽  
Dirac Point ◽  
Energy Gap ◽  
Impurity Doped

Recent progress in impurity-doped topological insulators has shown that the gap at the Dirac point shrinks with reducing temperature.

scholarly journals Shadow surface states in topological Kondo insulators

2021 ◽  
Author(s):  
Areg Ghazaryan ◽  
Emilian Nica ◽  
Onur Erten ◽  
Pouyan Ghaemi
Keyword(s):  
High Frequency ◽  
Dirac Point ◽  
Chemical Potential ◽  
Surface States ◽  
Support Surface ◽  
Finite Frequency ◽  
Fermi Surfaces ◽  
Quantum Oscillations ◽  
Kondo Insulators ◽  
Out Of Plane

Abstract The surface states of 3D topological insulators in general have negligible quantum oscillations when the chemical potential is tuned to the Dirac points. In contrast, we find that topological Kondo insulators can support surface states with an arbitrarily large Fermi surfaces when the chemical potential is pinned to the Dirac point. We illustrate that these Fermi surfaces give rise to finite-frequency quantum oscillations, which can become comparable to the extremal area of the unhybridized bulk bands. We show that this occurs when the crystal symmetry is lowered from cubic to tetragonal in a minimal two-orbital model. We label such surface modes as `shadow surface states'. Moreover, we show that the sufficient NNN out-of-plane hybridization leading to shadow surface states can be self-consistently stabilized for tetragonal topological Kondo insulators. Consequently, shadow surface states provide an important example of high-frequency quantum oscillations beyond the context of cubic topological Kondo insulators.

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

Temperature Dependence of Magnetic Domains and Wall Structures

1972 ◽  
Vol 30 ◽  
pp. 496-497
Author(s):  
Sonoko Tsukahara ◽  
Tadami Taoka ◽  
Hisao Nishizawa
Keyword(s):  
Temperature Dependence ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Iron Film ◽  
Objective Lens ◽  
Lorentz Microscopy ◽  
Domain Structures ◽  
Wall Structures ◽  
Crystal Films ◽  
Metallurgical Structure

The high voltage Lorentz microscopy was successfully used to observe changes with temperature; of domain structures and metallurgical structures in an iron film set on the hot stage combined with a goniometer. The microscope used was the JEM-1000 EM which was operated with the objective lens current cut off to eliminate the magnetic field in the specimen position. Single crystal films with an (001) plane were prepared by the epitaxial growth of evaporated iron on a cleaved (001) plane of a rocksalt substrate. They had a uniform thickness from 1000 to 7000 Å.The figure shows the temperature dependence of magnetic domain structure with its corresponding deflection pattern and metallurgical structure observed in a 4500 Å iron film. In general, with increase of temperature, the straight domain walls decrease in their width (at 400°C), curve in an iregular shape (600°C) and then vanish (790°C). The ripple structures with cross-tie walls are observed below the Curie temperature.

Temperature dependence of generation-recombination noise in p-n junctions

2002 ◽  
Vol 12 (3) ◽  
pp. 71-74
Author(s):  
J. A. Jiménez Tejada ◽  
A. Godoy ◽  
A. Palma ◽  
P. Cartujo
Keyword(s):  
Temperature Dependence
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