Spin and the Coulomb gap in the half-filled lowest Landau level

J. P. Eisenstein, T. Khaire, D. Nandi, A. D.K. Finck, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The Coulomb gap observed in tunneling between parallel two-dimensional electron systems, each at half-filling of the lowest Landau level, is found to depend sensitively on the presence of an in-plane magnetic field. Especially at low electron density, the width of the Coulomb gap at first increases sharply with in-plane field, but then abruptly levels off. This behavior appears to coincide with the known transition from partial to complete spin polarization of the half-filled lowest Landau level. The tunneling gap therefore opens a window onto the spin configuration of two-dimensional electron systems at high magnetic field.

Original languageEnglish (US)
Article number125409
JournalPhysical Review B
Issue number12
StatePublished - Sep 8 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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