Reconsideration of relativistic corrections for an electron confined in a two-dimensional quantum dot: I. Spin-orbit coupling and Rashba effect

Takahiro Yokozuka, Kota Ido, Richard Clark, Kyozaburo Takeda, Yasuhiro Tokura

研究成果: Article査読

5 被引用数 (Scopus)

抄録

By implementing the relativistic corrections of Pauli's spin-orbit (SO) coupling, Darwin's correction, and mass-velocity (MV) interaction, we computationally study the electronic structure of an electron confined in a two-dimensional (2D) quantum dot (QD), and discuss the influence of these relativistic terms. We further study the influence of the Rashba effect on the electronic structure. In the typical semiconductor QD system, the Rashba effect causes a sizeable shift to the energy eigenstates on the order of a milli-electron volt whereas the other relativistic corrections of the internal SO interaction, MV coupling, and Darwin term amount to a shift in energy eigenstates on the order of less than a micro-electron volt, and are largely negligible. The Rashba coupling hybridizes the opposite spin state, and the second-order perturbation approach reveals that this hybridization causes the interstate interference and a curious distribution appears in the spin density in the degenerated state.

本文言語English
論文番号031801
ジャーナルJapanese journal of applied physics
53
3
DOI
出版ステータスPublished - 2014 3

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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