Contrast between spin and valley degrees of freedom

T. Gokmen, Medini Padmanabhan, M. Shayegan

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We measure the renormalized effective mass (m*) of interacting two-dimensional electrons confined to an AlAs quantum well while we control their distribution between two spin and two valley subbands. We observe a marked contrast between the spin and valley degrees of freedom: When electrons occupy two spin subbands, m* strongly depends on the valley occupation but not vice versa. Combining our m* data with the measured spin and valley susceptibilities, we find that the renormalized effective Lande g factor strongly depends on valley occupation but the renormalized conduction-band deformation potential is nearly independent of the spin occupation.

Original languageEnglish (US)
Article number235305
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number23
StatePublished - Jun 3 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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