Zeeman splitting and spin-orbit interaction in Hg_1−xCd_xTe inversion layers

¹ National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences - Shanghai 200083, China
² Department of Nuclear Physics, China Institute of Atomic Energy - Beijing 102413, China
³ Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences - Shanghai 200083, China

^(a) yug@mail.sitp.ac.cn

Received: 10 May 2016
Accepted: 21 July 2016

Abstract

We studied the suppression of the weak antilocalization (WAL) effect and the dependence of spin dynamics for a two-dimensional electron gas in the inversion layers of two different Hg_1−xCd_xTe samples in the presence of in-plane magnetic field . The WAL magnetoconductance is fitted by the Golub model to acquire the variations of phase coherence time with increasing . The effective g-factors in the form of ( is the relative effective mass) at zero magnetic field and high magnetic field are obtained by investigating the electron dephasing with varying and measuring the spin splitting of the Shubnikov-de Hass oscillations, respectively. As the obtained g-factors are in accordance with the reported results, the suppression of the WAL effect can be attributed to the competition between Zeeman splitting and spin-orbit interaction rather than to the microroughness scattering.