Majorana bound states and nonlocal spin correlations in a quantum wire on an unconventional superconductor

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Sho Nakosai - , The University of Tokyo (Autor:in)
  • Jan Carl Budich - , Stockholm University (Autor:in)
  • Yukio Tanaka - , Nagoya University (Autor:in)
  • Björn Trauzettel - , Julius-Maximilians-Universität Würzburg (Autor:in)
  • Naoto Nagaosa - , The University of Tokyo, RIKEN (Autor:in)

Abstract

We study theoretically the proximity effect of a one-dimensional metallic quantum wire (in the absence of spin-orbit interaction) lying on top of an unconventional superconductor. Three different material classes are considered as a substrate: (i) a chiral superconductor in class D with broken time-reversal symmetry and a class DIII superconductor (ii) with and (iii) without a nontrivial Z2 number. Interestingly, we find degenerate zero energy Majorana bound states at both ends of the wire for all three cases. They are unstable against spin-orbit interaction in case (i), while they are topologically protected by time-reversal symmetry in cases (ii) and (iii). Remarkably, we show that nonlocal spin correlations between the two ends of the wire can be simply controlled by a gate potential in our setup.

Details

OriginalspracheEnglisch
Aufsatznummer117002
FachzeitschriftPhysical review letters
Jahrgang110
Ausgabenummer11
PublikationsstatusVeröffentlicht - 12 März 2013
Peer-Review-StatusJa
Extern publiziertJa

Schlagworte

ASJC Scopus Sachgebiete

Bibliotheksschlagworte