Conductance Quantization at Zero Magnetic Field in InSb Nanowires

Jakob Kammhuber, Maja C. Cassidy, H. Zhang, Önder Gül, F. Pei, Michiel W.A. De Moor, Bas Nijholt, Kenji Watanabe, Takashi Taniguchi, Diana Car, Sébastien R. Plissard, Erik P.A.M. Bakkers, Leo P. Kouwenhoven

Research output: Contribution to journalArticleScientificpeer-review

59 Citations (Scopus)

Abstract

Ballistic electron transport is a key requirement for existence of a topological phase transition in proximitized InSb nanowires. However, measurements of quantized conductance as direct evidence of ballistic transport have so far been obscured due to the increased chance of backscattering in one-dimensional nanowires. We show that by improving the nanowire-metal interface as well as the dielectric environment we can consistently achieve conductance quantization at zero magnetic field. Additionally we study the contribution of orbital effects to the sub-band dispersion for different orientation of the magnetic field, observing a near-degeneracy between the second and third sub-bands.

Original languageEnglish
Pages (from-to)3482-3486
Number of pages5
JournalNano Letters: a journal dedicated to nanoscience and nanotechnology
Volume16
Issue number6
DOIs
Publication statusPublished - 8 Jun 2016

Keywords

  • conductance quantization
  • InSb
  • nanowire
  • orbital effects
  • Quantum point contact
  • subband

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