Effects of dislocations on transport properties of two dimensional electron gas. I. Transport at zero magnetic field

1996 ◽  
Vol 79 (3) ◽  
pp. 1536-1545 ◽  
Author(s):  
Z. Bougrioua ◽  
J. L. Farvacque ◽  
D. Ferré
Keyword(s):  
Magnetic Field ◽  
Transport Properties ◽  
Electron Gas ◽  
Zero Magnetic Field ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas

scholarly journals PSEUDO-GAP AND SPIN POLARIZATION IN A TWO-DIMENSIONAL ELECTRON GAS

2003 ◽  
Vol 02 (06) ◽  
pp. 619-624
Author(s):  
VLADIMIR VYURKOV ◽  
ANDREY VETROV ◽  
VICTOR RYZHII
Keyword(s):  
Magnetic Field ◽  
Spin Polarization ◽  
Electron Gas ◽  
Zero Magnetic Field ◽  
Excitation Density ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Nonmonotonic Dependence ◽  
Dimensional Electron Gas

Tunneling (one-particle excitation) density of states in the vicinity of Fermi level of a two-dimensional electron gas (2DEG) subjected to an external parallel and zero magnetic field is calculated. It reveals a pseudo-gap recently observed in the experiments. The gap originates in spin polarization of 2DEG. Nonmonotonic dependence of energy on a Landau level filling factor (density) for perpendicular magnetic field was also obtained. It implies the tunneling current peculiarities at filling factors of about 1/2 and 1. The Ising-like model of the exchange interaction in 2DEG was exploited instead of the conventional one. It was crucial to achieve even a qualitative agreement with experimental data.

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