中国物理B ›› 2014, Vol. 23 ›› Issue (1): 17102-017102.doi: 10.1088/1674-1056/23/1/017102

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Spin texturing in a parabolically confined quantum wire with Rashba and Dresselhaus spin–orbit interactions

S. Saríkurta b, S. Şakiroğlub, K. Akgüngörb, İ. Sökmenb   

  1. a Dokuz Eylül University, The Graduate School of Natural and Applied Sciences, Physics Department, T?naztepe Campus, 35390, İzmir, Turkey;
    b Dokuz Eylül University, Faculty of Science, Physics Department, T?naztepe Campus, 35390 İzmir, Turkey
  • 收稿日期:2013-05-31 修回日期:2013-12-03 出版日期:2013-11-12 发布日期:2013-11-12
  • 基金资助:
    Project supported by Research Grants DEU-BAP:2009183 and DEU-BAP:2009184 from Scientific Research Fund of Dokuz Eylül University.

Spin texturing in a parabolically confined quantum wire with Rashba and Dresselhaus spin–orbit interactions

S. Saríkurta b, S. ?akiro?lub, K. Akgüngörb, ?. Sökmenb   

  1. a Dokuz Eylül University, The Graduate School of Natural and Applied Sciences, Physics Department, Tínaztepe Campus, 35390, ?zmir, Turkey;
    b Dokuz Eylül University, Faculty of Science, Physics Department, Tínaztepe Campus, 35390 ?zmir, Turkey
  • Received:2013-05-31 Revised:2013-12-03 Online:2013-11-12 Published:2013-11-12
  • Contact: S. Saríkurt E-mail:sevil.sarikurt@deu.edu.tr
  • Supported by:
    Project supported by Research Grants DEU-BAP:2009183 and DEU-BAP:2009184 from Scientific Research Fund of Dokuz Eylül University.

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摘要： In this study, we investigate theoretically the effect of spin–orbit coupling on the energy level spectrum and spin texturing of a quantum wire with a parabolic confining potential subjected to the perpendicular magnetic field. Highly accurate numerical calculations have been carried out using a finite element method. Our results reveal that the interplay between the spin–orbit interaction and the effective magnetic field significantly modifies the band structure, producing additional subband extrema and energy gaps. Competing effects between external field and spin–orbit interactions introduce complex features in spin texturing owing to the couplings in energy subbands. We obtain that spatial modulation of the spin density along the wire width can be considerably modified by the spin–orbit coupling strength, magnetic field and charge carrier concentration.

关键词: spin–, orbit coupling, zeeman splitting, quantum wire, spin texture

Abstract: In this study, we investigate theoretically the effect of spin–orbit coupling on the energy level spectrum and spin texturing of a quantum wire with a parabolic confining potential subjected to the perpendicular magnetic field. Highly accurate numerical calculations have been carried out using a finite element method. Our results reveal that the interplay between the spin–orbit interaction and the effective magnetic field significantly modifies the band structure, producing additional subband extrema and energy gaps. Competing effects between external field and spin–orbit interactions introduce complex features in spin texturing owing to the couplings in energy subbands. We obtain that spatial modulation of the spin density along the wire width can be considerably modified by the spin–orbit coupling strength, magnetic field and charge carrier concentration.

Key words: spin–, orbit coupling, zeeman splitting, quantum wire, spin texture

中图分类号:  (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)

  • 71.70.Ej
75.70.Tj (Spin-orbit effects) 73.21.Hb (Quantum wires) 85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)