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; Sergey Suchalkin

doi:10.1038/s41467-022-33560-x

arXiv · 2201.01938

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·Sergey Suchalkin

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Abstract

Realizing a large Land\'{e} $g$-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 $g\approx 104$, 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.

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Yuxuan Jiang, Maksim Ermolaev, Gela Kipshidze, Seongphill Moon, Mykhaylo Ozerov, Dmitry Smirnov, Zhigang Jiang, Sergey Suchalkin. 2022-01-06. Giant $g$-factors and fully spin-polarized states in metamorphic short-period InAsSb/InSb superlattices. https://doi.org/10.1038/s41467-022-33560-x

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