Resistively detected nuclear spin polarization in single narrow-gap quantum wells

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

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

Abstract

We demonstrate resistively detected nuclear magnetic resonance (RDNMR) in a two-dimensional electron gas (2DEG) formed in single InSb quantum wells. The large g factors of the InSb 2DEG enable construction of the simplest pseudospin quantum Hall ferromagnet (PQHF) characterized by a resistance spike at the filling factor of two using tilted magnetic fields. Dynamic nuclear polarization (DNP) occurs when a large current flows through the PQHF, resulting in the resistance change of the spike. RDNMR signals of high nuclear spin isotopes of In and Sb are clearly observed. Domain structures are believed to be responsible for the DNP process.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 30th International Conference on the Physics of Semiconductors, ICPS-30
Pages625-626
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
  • Nuclear magnetic resonance
  • dynamic nuclear polarization
  • quantum Hall ferromagnet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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