Valley and spin splittings in PbSe nanowires

I. D. Avdeev, A. N. Poddubny, S. V. Goupalov, M. O. Nestoklon

Research output: Contribution to journalArticlepeer-review

Abstract

We use an empirical tight-binding approach to calculate electron and hole states in [111]-grown PbSe nanowires. We show that the valley-orbit and spin-orbit splittings are very sensitive to the atomic arrangement within the nanowire elementary cell and differ for [111] nanowires with microscopic D3d,C2h, and D3 symmetries. For the nanowire diameter below 4 nm the valley-orbit splittings become comparable with the confinement energies and the k·p method is inapplicable. Nanowires with the D3 point symmetry having no inversion center exhibit giant spin splitting E=αkz, linear in one-dimensional wave vector kz, with the constant α up to 1eVÅ.

Original languageEnglish
Article number085310
JournalPhysical Review B
Volume96
Issue number8
DOIs
StatePublished - 25 Aug 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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