Dependence of persistent gaps at Landau level crossings on relative spin

K. Vakili, T. Gokmen, O. Gunawan, Y. P. Shkolnikov, E. P. De Poortere, M. Shayegan

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We report measurements of the quantum Hall state energy gap at avoided crossings between Landau levels originating from different conduction band valleys in AlAs quantum wells. These gaps exhibit an approximately linear dependence on the magnetic field over a wide range of fields and filling factors. More remarkably, we observe an unexpected dependence of the gap size on the relative spin orientation of the crossing levels, with parallel-spin crossings exhibiting larger gaps than antiparallel-spin crossings.

Original languageEnglish (US)
Article number116803
JournalPhysical review letters
Issue number11
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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