Nonlinear spin polarization dependence of spin susceptibility in interacting two-dimensional electron systems

Kaifeng Yang, Hongwu Liu, K. Nagase, K. Amakata, T. D. Mishima, M. B. Santos, Y. Hirayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We measure the spin polarization (P) of two-dimensional electron gases confined to an InSb quantum well using parallel and tilted magnetic fields. The nonlinear field dependence of P is prominent, leading to a direct deduction of the spin susceptibility (χ s) over a wide range of P from 0.07 to 1. χ s is found to increase nonlinearly with P and exceed χ gm ∝ m*g* (where m* and g* are the effective mass and g factor) as commonly used in experiments. We show that χ s and χ gm obey a square law χ s/ χ 0=(χ gm0) 2, where χ 0 is the paramagnetic spin susceptibility.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 30th International Conference on the Physics of Semiconductors, ICPS-30
Pages677-678
Number of pages2
DOIs
Publication statusPublished - 2011 Dec 1
Event30th International Conference on the Physics of Semiconductors, ICPS-30 - Seoul, Korea, Republic of
Duration: 2010 Jul 252010 Jul 30

Publication series

NameAIP Conference Proceedings
Volume1399
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other30th International Conference on the Physics of Semiconductors, ICPS-30
CountryKorea, Republic of
CitySeoul
Period10/7/2510/7/30

Keywords

  • InSb
  • spin susceptibility

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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