Interference effects of helical current: Geometry-dependent spin polarization of transmitted electrons

Shumpei Masuda*, Yoshio Kuramoto

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Quantum interference effects of the helical spin current are explored in two-dimensional topological insulators by means of a one-dimensional chain model that simulates the edge states. Peculiar transport properties of the circular edge are revealed in terms of an interferometer with two or three leads. The spin of transmitted electrons changes according to its kinetic energy and the arc lengths of the interferometer. It is also shown that the interferometer with three leads can generate spin polarized current from injection of spin unpolarized electrons.

Original languageEnglish
Article number195327
Number of pages8
JournalPhysical Review B
Volume85
Issue number19
DOIs
Publication statusPublished - 29 May 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • HGTE QUANTUM-WELLS
  • CONTACTS
  • STATE

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