Spin-Orbit Interaction in Two Dimensional Systems in InAs n -Inversion Layers
1987; Physical Society of Japan; Volume: 56; Issue: 4 Linguagem: Inglês
10.1143/jpsj.56.1293
ISSN1347-4073
AutoresYoichi Kawaguchi, Isao Takayanagi, Shinji Kawaji,
Tópico(s)Atomic and Subatomic Physics Research
ResumoNegative magnetoconductance has been observed in n -inversion layers of InAs at temperatures between 1.05 and 77 K in magnetic fields up to 1.5 T. The experimental magnetoconductance in parallel magnetic fields is well reproduced using the localization theory with the spin-orbit interaction of Maekawa and Fukuyama. The relaxalion time of inelastic scattering τ ε is 1.5×10 -12 s at 77 K, and the temperature dependence of τ ε is expressed as τ ε ∝ T -0.08 . The relaxation time of the spin-orbit interaction is 8×10 -13 s, and is independent of the temperature. However, the theory cannot reproduce the experimental magnetoconductance in a perpendicular field. This discrepancy shows that the theory should take the anisotropy of spin-orbit interaction into account.
Referência(s)