Mode softening in charge-density excitations of a two-dimensional electron gas driven by Rashba spin-orbit interaction


Autoria(s): Wu XG (Wu X. G.); Xu LJ (Xu L. J.); Zheng HZ (Zheng H. Z.)
Data(s)

2006

Resumo

The electron density response of a uniform two-dimensional (2D) electron gas is investigated in the presence of a perpendicular magnetic field and Rashba spin-orbit interaction (SOI). It is found that, within the Hartree-Fock approximation, a charge density excitation mode below the cyclotron resonance frequency shows a mode softening behavior, when the spin-orbit coupling strength falls into a certain interval. This mode softening indicates that the ground state of an interacting uniform 2D electron gas may be driven by the Rashba SOI to undergo a phase transition to a nonuniform charge density wave state.

Identificador

http://ir.semi.ac.cn/handle/172111/10314

http://www.irgrid.ac.cn/handle/1471x/64350

Idioma(s)

英语

Fonte

Wu XG (Wu X. G.); Xu LJ (Xu L. J.); Zheng HZ (Zheng H. Z.) .Mode softening in charge-density excitations of a two-dimensional electron gas driven by Rashba spin-orbit interaction ,PHYSICAL REVIEW B,2006,74(16):Art.No.165309

Palavras-Chave #半导体物理 #LANDAU-LEVELS #SEMICONDUCTORS #LAYERS #WAVE
Tipo

期刊论文