Large zeeman splitting in out-of-plane magnetic field in a double-layer quantum point contact

Daiju Terasawa, Shota Norimoto, Tomonori Arakawa, Meydi Ferrier, Akira Fukuda, Kensuke Kobayashi, Yoshiro Hirayama

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, we observe that the conductance of a quantum point contact on a GaAs=AlGaAs double quantum well depends significantly on the magnetic field perpendicular to the two-dimensional electron gas. In the presence of the magnetic field, the subband edge splitting due to the Zeeman energy reaches 0.09 meV at 0.16 T, thereby suggesting an enhanced g-factor. The estimated g-factor enhancement is 17.5 times that of the bare value. It is considered that a low electron density and high mobility makes it possible to reach a strong many-body interaction regime in which this type of strong enhancement in g-factor can be observed.

Original languageEnglish
Article number024709
Journaljournal of the physical society of japan
Volume90
Issue number2
DOIs
Publication statusPublished - 2021

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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