Interplay of Coulomb Blockade and Luttinger-Liquid Physics in Disordered 1D InAs Nanowires with Strong Spin-Orbit Coupling

R. Hevroni*, V. Shelukhin, M. Karpovski, M. Goldstein, E. Sela, A. Palevski, Hadas Shtrikman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Ballistic 1D nanowires (NWs) with strong spin-orbit coupling are theoretically predicted to exhibit nonmonotonic conductance steps of size G0=e2/h as the electron density is varied by the gate voltage VG. Although many attempts have been made to measure these conductance steps, they have not been observed yet in either InAs or InSb NWs. This indicates that disorder plays an essential role, preventing the motion of the electrons between the contacts from being ballistic. It is well known that in 1D systems, electron-electron interactions, described by the Luttinger-liquid (LL) model, amplify the role of disorder significantly, causing the conductance to vanish at zero temperature even for very weak disorder. Experimentally, however, the effects of the interactions in NWs with strong spin-orbital scattering have not yet been reported. This chapter reports on experimental studies of the Coulomb blockade in disordered InAs NW at low temperatures. It demonstrates that sequential tunneling is strongly affected by electron-electron interactions.

Original languageEnglish
Title of host publicationFuture Trends in Microelectronics
Subtitle of host publicationJourney into the Unknown
PublisherWiley-IEEE Press
Pages233-241
Number of pages9
ISBN (Electronic)9781119069225
ISBN (Print)9781119069119
DOIs
StatePublished - 19 Sep 2016

Keywords

  • Ballistic 1D nanowires
  • Coulomb blockade
  • Electron-electron interactions
  • Gate voltage
  • InAs nanowires
  • Luttinger-liquid model
  • Nonmonotonic conductance steps
  • Sequential tunneling
  • Strong spin-orbit coupling
  • Strong spin-orbital scattering

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