scholarly journals Beating of oscillations in transport coefficients of a one-dimensionally periodically modulated two-dimensional electron gas in the presence of spin-orbit interaction

2005 ◽  
Vol 71 (12) ◽  
Author(s):  
X. F. Wang ◽  
P. Vasilopoulos ◽  
F. M. Peeters
Keyword(s):  
Transport Coefficients ◽  
Electron Gas ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Spin Orbit Interaction ◽  
Dimensional Electron Gas

INFLUENCE OF SPIN-ORBIT INTERACTION ON THE MAGNETOTRANSPORT OF A PERIODICALLY MODULATED TWO-DIMENSIONAL ELECTRON GAS

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3653-3656
Author(s):  
X. F. WANG ◽  
P. VASILOPOULOS ◽  
F. M. PEETERS
Keyword(s):  
Transport Coefficients ◽  
Electron Gas ◽  
Orbit Interaction ◽  
Flat Band ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Spin Orbit Interaction ◽  
Dimensional Electron Gas

Transport properties of a two-dimensional electron gas (2DEG) are studied in the presence of a normal magnetic field B, of a weak one-dimensional (1D) periodic potential modulation V(x)=V0cos(Kx), and of the Rashba spin-orbit interaction (SOI) of strength α. For V(x)=0 the SOI mixes the up and down spin states of neighboring Landau levels into two, unequally spaced energy branches. For V(x)≠0 these levels broaden into bands and their bandwidths oscillate with B. The n-th level bandwidth of each series vanishes at different values of B. Relative to the 1D-modulated 2DEG without SOI and one flat-band condition, there are two flat-band conditions that depend on α and the transport coefficients can change considerably. For weak α the Weiss oscillations show beating patterns while for strong α the Shubnikov-de Haas ones are split in two.

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