Microwave radiation absorption and Shubnikov-de Haas oscillations of InAs/GaSb/AlSb quantum wells

0452022 - FZÚ 2016 eng A - Abstrakt
Mikhailova, M. P. - Veinger, A.I. - Kochman, I.V. - Semenikhin, P.V. - Kalinina, K.V. - Parfeniev, R.V. - Berezovets, V.A. - Hospodková, Alice - Pangrác, Jiří - Hulicius, Eduard
Microwave radiation absorption and Shubnikov-de Haas oscillations of InAs/GaSb/AlSb quantum wells.
NATO Advanced Research Workshop on THz Diagnostics of CBRN effects and Detection of Explosives & CBRN. Tera-MIR 2015. Abstract Book. Tera-MIR, 2015. s. 46-46.
[NATO Advanced Research Workshop on THz Diagnostics of CBRN effects and Detection of Explosives & CBRN. Tera-MIR 2015. 02.11.2015-06.11.2015, Izmir]
Grant CEP: GA ČR GA13-15286S; GA MŠMT(CZ) LM2011026
Grant ostatní: COST(XE) MP1204
Institucionální podpora: RVO:68378271
Klíčová slova: GaSb * InAs * semimetal quantum wells * Shubnikov-de Haas oscillations
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Magnetotransport, optical, spin-dependent and topological properties of the composite InAs/GaSb/AlSb quantum wells (CQWs) based on the broken-gap heterojunctions are actively studied during two last decades as promising materials for spintronics and nanoelectronics applications. We report first study of absorption of microwave radiation and Shubnikov-de Haas oscillations (SHO) in semimetal InAs/GaSb/AlAs CQWs at temperatures 2.7-20 K and in magnetic field H<14 kOe. CQWs were grown by MOVPE on n-GaSb substrates with various widths of InAs and GaSb QWs surrounded by AlSb barriers and GaSb cap layer. Method of electron paramagnetic resonance spectroscopy was used and derivate microwave power was measured. Intensive SHO were observed at H>7-14 kOe. Temperature and orientation dependence of SHO amplitudes were recorded. Cyclotron frequency and non-parabolicity of effective mass were evaluated for the samples with different QW widths. Unusual anisotropy of angular dependence of the oscillation amplitudes on orientation of CQW samples in magnetic field was observed. This effect can be explained by an inversion asymmetry which is the feature of substances with lack of inversion center.
Trvalý link: http://hdl.handle.net/11104/0253053