Spin-orbit splitting and effective masses in p-type GaAs two-dimensional hole gases
Pal, Atindra N.
Ihn, Thomas Markus
- Working Paper
We present magnetotransport measurements performed on two-dimensional hole gases embedded in carbon doped p-type GaAs/AlGaAs heterostructures grown on  oriented substrates. A pronounced beating pattern in the Shubnikov-de Haas oscillations proves the presence of strong spin-orbit interaction in the device under study. We estimate the effective masses of spin-orbit-split subbands by measuring the temperature dependence of the Shubnikov-de Haas oscillations at different hole densities. While the lighter heavy-hole effective mass is not energy dependent, the heavier heavy-hole effective mass has a prominent energy dependence, indicating a strong spin-orbit induced nonparabolicity of the valence band. The measured effective masses show qualitative agreement with self-consistent numerical calculations. Show more
Journal / seriesarXiv
Pages / Article No.
Organisational unit03439 - Ensslin, Klaus / Ensslin, Klaus
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Is new version of: https://doi.org/10.3929/ethz-a-010344890
Is previous version of: http://hdl.handle.net/20.500.11850/94569
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