Results 261 to 270 of about 95,605 (300)
Viscous electron flow in mesoscopic two-dimensional electron gas
AIP Advances, 2018 We report electrical and magneto transport measurements in mesoscopic size, two-dimensional (2D) electron gas in a GaAs quantum well. Remarkably, we find that the probe configuration and sample geometry strongly affects the temperature evolution of local
G M Gusev, A K Bakarov, Gusev G M
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Coulomb blockade of tunneling in a 2D electron gas
Surface Science, 1992The 2D electron gas of a GaAs/GaAlAs heterojunction is confined to a small island by means of Schottky gates. Two gates provide adjustable tunnel barriers and a central gate controls the electron number of the island. Conductance oscillations, periodic with the electron number, are observed in the Coulomb blockade regime with negligible energy level ...
C. Pasquier +5 more
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RESIDUAL BULK VISCOSITY OF A 2D ELECTRON GAS
2021The nonzero bulk viscosity signals breaking of the scale invariance. We demonstrate that a disorder in two-dimensional noninteracting electron gas in a perpendicular magnetic field results in the nonzero disorder-averaged bulk viscosity. We derive analytic expression for the bulk viscosity within the self-consistent Born approximation.
Zahkarov, Vl.A., Burmistrov, I.S.
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The instability of 2D electron gas at high density
Surface Science, 1986The edge-energy of a 2D electron gas with high density is calculated, where the edge-energy implies the energy which is needed to form a unit length of a new edge when a 2D infinite homogeneous electron sheet is cleft into two pieces of semi-infinite sheets. It is found that, when rs < 0.415, the edge-energy becomes negative.
Xin Sun, Han-kun Xie, Shi-xun Zhou
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Imaging the electron-phonon interaction in the 2D electron gas
Physica B: Condensed Matter, 1991Abstract Ballistic phonon imaging techniques have been used to study the electron-photon interaction in the 2D electron gas (2DEG). Anisotropies in the phonon wavevector distribution arise out of the requirements for energy and momentum conservation when a phonon is emitted or absorbed and from the angular dependence of the electron-photon coupling ...
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Phonon-Emission Spectroscopy of a 2D-Electron Gas
Physica Scripta, 1989A heated two-dimensional electron gas in a Si MOS structure (2d EG) emits phonons into the bulk substrate. At low temperatures (?1 K) and moderate electric fields (?10 V cm-1) these phonons are acoustical ones. We detected them using superconducting tunnel junctions and found that the phonon spectra had a remarkable cut-off whenever the phonon wave ...
W Dietsche, M Rothenfusser, L Köster
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Bosonization of a 2D electron gas in a magnetic field
Zeitschrift für Physik B Condensed Matter, 1996Starting from a Landau level description of a 2D fermion gas subject to a perpendicular uniform magnetic field, under the condition that there is a large integer number of filled Landau levels, we introduce a bosonization scheme for the low energy excitations of the system. We give an explicit construction of the fermion operator in terms of the bosons
H. Westfahl +2 more
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Ultrafast Coherent Electron Spin Flip in a 2D Electron Gas
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009Spin flip in a 2D electron gas is realized with a 2 ps, off-resonant laser pulse. Complete spin flip leads to spin precessions that are symmetric with respect to the arrival time of the π-pulse.
Carey Phelps +2 more
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Magnetic-field dependence of the electron–LO-phonon interaction in a 2D electron gas
Europhysics Letters (EPL), 1998The intensities of the circularly polarized luminescence of the radiative recombination between two-dimensional electrons and bound holes and of its longitudinal optic (LO) phonon low-energy sideband have been investigated at low temperatures of about 100 mK as a function of the magnetic field.
Hartmann, C. +4 more
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Magnetization and incompressibility of a high mobility 2D electron gas in the IQHE
Physica B: Condensed Matter, 1998We have measured the magnetization of a single layer, high mobility 2D electron gas in the quantum limit. Sharp diamagnetic jumps in the magnetization are observed when an integer number of Landau levels is filled. We relate these jumps to incompressibility gaps in the energy spectrum of the order of the cyclotron energy, in which a small fraction of ...
Wiegers, S. +8 more
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