High-quality two-dimensional electron gas in undoped InSb quantum wells

Z Lei, E Cheah, K Rubi, ME Bal, C Adam, R Schott… - Physical Review …, 2022 - APS
We report on transport experiments through high-mobility gate-tunable undoped InSb
quantum wells (QWs). Due to the elimination of any Si modulation do**, the gate-defined …

Gate-defined quantum point contact in an InSb two-dimensional electron gas

Z Lei, CA Lehner, E Cheah, C Mittag, M Karalic… - Physical Review …, 2021 - APS
We investigate an electrostatically defined quantum point contact (QPC) in a high-mobility
InSb two-dimensional electron gas. Well-defined conductance plateaus are observed, and …

Beating-free quantum oscillations in two-dimensional electron gases with strong spin-orbit and Zeeman interactions

DR Candido, SI Erlingsson, H Gramizadeh… - Physical Review …, 2023 - APS
Shubnikov-de Haas (SdH) oscillations are the fingerprint of the Landau and Zeeman
splitting level structure on the resistivity in presence of a moderate magnetic field before full …

Quantum Transport in InSb Quantum Well Devices: Progress and Perspective

Z Lei, E Cheah, R Schott, CA Lehner… - Journal of Physics …, 2024 - iopscience.iop.org
InSb, a narrow-band III-V semiconductor, is known for its small bandgap, small electron
effective mass, high electron mobility, large effective g-factor, and strong spin-orbit …

Quantum Hall effect in InAsSb quantum wells at elevated temperatures

ME Bal, E Cheah, Z Lei, R Schott, CA Lehner… - Physical Review …, 2024 - APS
We have characterized the electronic properties of a high-mobility two-dimensional electron
system in modulation doped InAsSb quantum wells and compare them to InSb quantum …

Field effect two-dimensional electron gases in modulation-doped InSb surface quantum wells

EA Bergeron, F Sfigakis, Y Shi, G Nichols… - Applied Physics …, 2023 - pubs.aip.org
We report on transport characteristics of field effect two-dimensional electron gases (2DEGs)
in surface indium antimonide quantum wells. The topmost 5 nm of the 30 nm wide quantum …

Magneto-transport study on Sn-rich Sn1− xGex thin films enabled by CdTe buffer layer

R Basnet, D Upreti, TT McCarthy, Z Ju… - Journal of Vacuum …, 2024 - pubs.aip.org
α-Sn, generally known as gray tin, has attracted significant scientific interest due to its
potential to host novel topological phases. Studying the transport properties of α-Sn thin …

A backgate for enhanced tunability of holes in planar germanium

L Ruggiero, A Nigro, I Zardo, A Hofmann - Nano Letters, 2024 - ACS Publications
Planar semiconductor heterostructures offer versatile device designs and are promising
candidates for scalable quantum computing. Notably, heterostructures based on strained …

Helical conducting edge states in narrow-gap semiconductors without band inversion

WK Lou, W Yang, K Chang - Physical Review B, 2022 - APS
Band inversion accompanied by the emergence of gapless and helical edge states at the
boundary is a hallmark of 2D topological insulators. However, a recent experiment reports …

Gate-defined two-dimensional hole and electron systems in an undoped InSb quantum well

Z Lei, E Cheah, F Krizek, R Schott, T Bähler… - Physical Review …, 2023 - APS
Quantum transport measurements are performed in gate-defined, high-quality, two-
dimensional hole and electron systems in an undoped InSb quantum well. For both …