Magneto‐quantum transport in Al_xGa_1–xAs_ySb_1–y/InAs quantum wells

Abstract

Magneto-quantum transport properties in Al x Ga 1-x As y Sb 1-y /InAs deep quantum wells (QWs) with different well width (L w = 15 and 50 nm) have been studied both in low and high magnetic fields. The low-field magnetoconductance has been explained in the light of the two-dimensional weak-localization theory taking account of the effect of Zeeman splitting on spin-orbit scattering of electrons. Analysis of Quantum Hall effect (QHE) in high-field region for L w = 50 nm indicates the existence of a small number of holes only partially participating with the QHE, suggesting that our QW is a type-II hetero-structure.