Near surface indium arsenide quantum wells have recently attracted a great deal of interest since they can be interfaced epitaxially with superconducting films and have proven to be a robust platform for exploring mesoscopic and topological superconductivity. In this work, we present magnetotransport properties of two-dimensional electron gases confined to an indium arsenide quantum well near the surface. The electron mass extracted from the envelope of the Shubnikov-de Haas oscillations shows an average effective mass m∗ = 0.04 at low magnetic field. Complementary to our magnetotransport study, we employed cyclotron resonance measurements and extracted the electron effective mass in the ultra high magnetic field regime. Our measurements show that the effective mass depends on magnetic field in this regime. The data can be understood by considering a model that includes non-parabolicity of the indium arsenide conduction bands.
@article{arxiv.1911.02738,
title = {Experimental Measurements of Effective Mass in Near Surface InAs Quantum Wells},
author = {Joseph Yuan and Mehdi Hatefipour and Brenden A. Magill and William Mayer and Matthieu C. Dartiailh and Kasra Sardashti and Kaushini S. Wickramasinghe and Giti A. Khodaparast and Yasuhiro H. Matsuda and Yoshimitsu Kohama and Zhuo Yang and Sunil Thapa and Christopher J. Stanton and Javad Shabani},
journal= {arXiv preprint arXiv:1911.02738},
year = {2020}
}