Properties of charge and magnetic impurities in a spin-polarized electron gas: A semiclassical approach

2005 ◽  
Vol 28 (3) ◽  
pp. 313-322 ◽  
Author(s):  
Ali A. Shokri ◽  
K. Esfarjani
Keyword(s):  
Electron Gas ◽  
Magnetic Impurities ◽  
Semiclassical Approach ◽  
Spin Polarized

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 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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