Experimental realization of a ballistic spin interferometer based on the Rashba effect using a nanolithographically defined square loop array

Takaaki Koga, Yoshiaki Sekine, Junsaku Nitta

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

We succeeded in observing gate-controlled electron spin interference in nanolithographically defined square loop arrays that were fabricated in In0.52 Al0.48 As In0.53 Ga0.47 As In0.52 Al0.48 As quantum wells (QWs). In this experiment, we demonstrated electron spin precession in ballistic channels within the QW that is caused by the Rashba effect. It turned out that the spin precession angle θ was gate controllable by more than 0.75π for a length of 1.5 μm. Thus, the demonstration of the large controllability of θ by the applied gate voltage was carried out in a more direct way using spin interference of an electron wave function than the conventional beating analysis of the Shubnikov-de Haas oscillations.

Original languageEnglish
Article number041302
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number4
DOIs
Publication statusPublished - 2006 Jul 20

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Experimental realization of a ballistic spin interferometer based on the Rashba effect using a nanolithographically defined square loop array'. Together they form a unique fingerprint.

  • Cite this