scholarly journals Relaxation of spin-polarized low-density electron gas

2017 ◽  
pp. 1-23
Author(s):  
Igor Vadimovich Fomin ◽  
Pavel Vasilievich Sasorov
Keyword(s):  
Electron Gas ◽  
Low Density ◽  
Spin Polarized

scholarly journals Transparency and stability of low density stellar plasma related to Boltzmann statistics and to thermal bremsstrahlung

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Y. Ben-Aryeh
Keyword(s):  
Large Volume ◽  
Spherical Symmetry ◽  
Total Mass ◽  
Electron Gas ◽  
Low Density ◽  
Gravitational Forces ◽  
Magnetic Spectrum ◽  
Boltzmann Statistics ◽  
Electro Magnetic ◽  
The Stability

AbstractThe stability of low density stellar plasma is analyzed for a star with a spherical symmetry which is in equilibrium between the gravitational attractive forces and the repulsive pressure forces of an ideal electron gas where the analysis is developed by the use of Boltzmann statistics. Fundamental results are obtained for the radius and total mass of such star and its gravitational forces are large due to the extreme large volume. The absorption and emission of radiation for extremely low density star plasmas is very small over the entire electro-magnetic spectrum.

scholarly journals Counter-propagating charge transport in the quantum Hall effect regime

Science ◽  
2019 ◽  
Vol 363 (6422) ◽  
pp. 54-57 ◽  
Author(s):  
Fabien Lafont ◽  
Amir Rosenblatt ◽  
Moty Heiblum ◽  
Vladimir Umansky
Keyword(s):  
Hall Effect ◽  
Quantum Hall Effect ◽  
Electron Gas ◽  
Quantum Hall ◽  
Charge Carriers ◽  
Perpendicular Magnetic Field ◽  
Quantum Hall Regime ◽  
Hall Regime ◽  
Spin Polarized ◽  
Conjugate States

The quantum Hall effect, observed in a two-dimensional (2D) electron gas subjected to a perpendicular magnetic field, imposes a 1D-like chiral, downstream, transport of charge carriers along the sample edges. Although this picture remains valid for electrons and Laughlin’s fractional quasiparticles, it no longer holds for quasiparticles in the so-called hole-conjugate states. These states are expected, when disorder and interactions are weak, to harbor upstream charge modes. However, so far, charge currents were observed to flow exclusively downstream in the quantum Hall regime. Studying the canonical spin-polarized and spin-unpolarized v = 2/3 hole-like states in GaAs-AlGaAs heterostructures, we observed a significant upstream charge current at short propagation distances in the spin unpolarized state.

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