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Portrait of Heiner Linke; Photo: Kennet Ruona

Heiner Linke

Professor, Deputy dean at Faculty of Engineering, LTH

Portrait of Heiner Linke; Photo: Kennet Ruona

Field-orientation dependence of the Zeeman spin splitting in (In,Ga)As quantum point contacts

Author

  • T. P. Martin
  • A. Szorkovszky
  • A. P. Micolich
  • A. R. Hamilton
  • C. A. Marlow
  • R. P. Taylor
  • Heiner Linke
  • Hongqi Xu

Summary, in English

We study the Zeeman spin splitting in a quantum point contact (QPC) etched into an InGaAs/InP heterostructure for three orthogonal magnetic field orientations with respect to the QPC. For the two in-plane orientations we observe an isotropic Zeeman spin splitting, which becomes stronger as the system is made more one dimensional. The Lande g factor is enhanced by up to a factor of two compared to two-dimensional electron systems in InGaAs/InP. A much larger Zeeman splitting is observed when the field is oriented perpendicular to the heterostructure, resulting in a g factor of 15.7 in the one-dimensional limit.

Department/s

  • Solid State Physics
  • NanoLund

Publishing year

2010

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

81

Issue

4

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1098-0121