Pump-probe nuclear spin relaxation study of the quantum Hall ferromagnet at filling factor ν = 2

K. F. Yang, M. M. Uddin, K. Nagase, T. D. Mishima, M. B. Santos, Y. Hirayama, Z. N. Yang, H. W. Liu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The nuclear spin-lattice relaxation time T 1 of the ν = 2 quantum Hall ferromagnet (QHF) formed in a gate-controlled InSb two-dimensional electron gas has been characterized using a pump-probe technique. In contrast to a long T 1 of quantum Hall states around ν = 1 that possesses a Korringa-type temperature dependence, the temperature-independent short T 1 of the ν = 2 QHF suggests the presence of low energy collective spin excitations in a domain wall. Furthermore, T 1 of this ferromagnetic state is also found to be filling- A nd current-independent. The interpretation of these results as compared to the T 1 properties of other QHFs is discussed in terms of the domain wall skyrmion, which will lead to a better understanding of the QHF.

Original languageEnglish
Article number083004
JournalNew Journal of Physics
Volume21
Issue number8
DOIs
Publication statusPublished - 2019 Aug 5
Externally publishedYes

Keywords

  • Domain wall skyrmion
  • Nuclear spin-lattice relaxation time
  • Quantum hall ferromagnet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Pump-probe nuclear spin relaxation study of the quantum Hall ferromagnet at filling factor ν = 2'. Together they form a unique fingerprint.

Cite this