Effects of Rashba spin splitting and exchange interaction in electron spin resonance in narrow-gap quantum well heterostructures

20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics

Krishtopenko, S.S.^1,2 ; Maremyanin, K.V.^1 ; Malyzhenkov, A.V.^1 ; Kalinin, K.P.^1 ; Ikonnikov, A.V.^1 ; Gavrilenko, V.I.^1 ; Goiran, M.^2 ; Sadofyev, Yu.G.^3

Institute for Physics of Microstructures, Russian Academy of Sciences, GSP-105, Nizhny Novgorod, 603950, Russia^1

Laboratoire National des Champs Magnétiques Intenses (LNCMI-T), CNRS UPR 3228, Université de Toulouse, 143 Avenue de Rangueil, F-31400 Toulouse, France^2

P.N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russia^3

关键词: 2-D electron gas (2DEG);    ESR techniques;    G factors;    Low magnetic fields;    Many-body theory;    Narrow gap;    Quantum well heterostructures;    Rashba spin splitting;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/456/1/012021/pdf
DOI  :  10.1088/1742-6596/456/1/012021

来源: IOP

【 摘 要 】

We report an electron spin resonance (ESR) study in n-type narrow-gap quantum well (QW) heterostructures. By using the Hartree-Fock approximation based on the 8 k·p Hamiltonian the many-body theory of the ESR in narrow-gap QWs is developed. We have discovered significant enhancement of the ESR g-factor and its low-magnetic-field divergence in both in asymmetric and symmetric QWs which is caused by the exchange interaction in 2D electron gas (2DEG). The ESR energies estimated for 2DEG in asymmetrical InAs/AlSb QWs are compared with the experimental results obtained by electrically detected ESR technique.