Giant g-factors and fully spin-polarized states in metamorphic short-period InAsSb/InSb superlattices

Yuxuan Jiang, Maksim Ermolaev, Gela Kipshidze, Seongphill Moon, Mykhaylo Ozerov, Dmitry Smirnov, Zhigang Jiang () and Sergey Suchalkin ()
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Yuxuan Jiang: Georgia Institute of Technology
Maksim Ermolaev: Stony Brook University
Gela Kipshidze: Stony Brook University
Seongphill Moon: National High Magnetic Field Laboratory
Mykhaylo Ozerov: National High Magnetic Field Laboratory
Dmitry Smirnov: National High Magnetic Field Laboratory
Zhigang Jiang: Georgia Institute of Technology
Sergey Suchalkin: Stony Brook University

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Realizing a large Landé g-factor of electrons in solid-state materials has long been thought of as a rewarding task as it can trigger abundant immediate applications in spintronics and quantum computing. Here, by using metamorphic InAsSb/InSb superlattices (SLs), we demonstrate an unprecedented high value of g ≈ 104, twice larger than that in bulk InSb, and fully spin-polarized states at low magnetic fields. In addition, we show that the g-factor can be tuned on demand from 20 to 110 via varying the SL period. The key ingredients of such a wide tunability are the wavefunction mixing and overlap between the electron and hole states, which have drawn little attention in prior studies. Our work not only establishes metamorphic InAsSb/InSb as a promising and competitive material platform for future quantum devices but also provides a new route toward g-factor engineering in semiconductor structures.

Date: 2022
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DOI: 10.1038/s41467-022-33560-x

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