Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas

Folkert K. de Vries, Jie Shen, Rafal J. Skolasinski, Michal P. Nowak, Daniel Varjas, Lin Wang, Michael Wimmer, Joost Ridderbos, Floris A. Zwanenburg, Ang Li, Sebastian Koelling, Marcel A. Verheijen, Erik P.A.M. Bakkers, Leo P. Kouwenhoven

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
37 Downloads (Pure)

Abstract

Low dimensional semiconducting structures with strong spin-orbit interaction (SOI) and induced superconductivity attracted great interest in the search for topological superconductors. Both the strong SOI and hard superconducting gap are directly related to the topological protection of the predicted Majorana bound states. Here we explore the one-dimensional hole gas in germanium silicon (Ge-Si) core-shell nanowires (NWs) as a new material candidate for creating a topological superconductor. Fitting multiple Andreev reflection measurements shows that the NW has two transport channels only, underlining its one-dimensionality. Furthermore, we find anisotropy of the Landé g-factor that, combined with band structure calculations, provides us qualitative evidence for the direct Rashba SOI and a strong orbital effect of the magnetic field. Finally, a hard superconducting gap is found in the tunneling regime and the open regime, where we use the Kondo peak as a new tool to gauge the quality of the superconducting gap.

Original languageEnglish
Pages (from-to)6483-6488
JournalNano Letters
Volume18
Issue number10
DOIs
Publication statusPublished - 7 Sep 2018

Fingerprint

Superconductivity
spin-orbit interactions
Orbits
superconductivity
Gases
Superconducting materials
Nanowires
nanowires
gases
Germanium
Silicon
Band structure
Gages
germanium
Anisotropy
Magnetic fields
orbitals
anisotropy
silicon
magnetic fields

Keywords

  • g-factor anisotropy
  • hole transport
  • Josephson junction
  • multiple Andreev reflection
  • nanowires
  • Spin-orbit interaction

Cite this

de Vries, F. K., Shen, J., Skolasinski, R. J., Nowak, M. P., Varjas, D., Wang, L., ... Kouwenhoven, L. P. (2018). Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas. Nano Letters, 18(10), 6483-6488. https://doi.org/10.1021/acs.nanolett.8b02981
de Vries, Folkert K. ; Shen, Jie ; Skolasinski, Rafal J. ; Nowak, Michal P. ; Varjas, Daniel ; Wang, Lin ; Wimmer, Michael ; Ridderbos, Joost ; Zwanenburg, Floris A. ; Li, Ang ; Koelling, Sebastian ; Verheijen, Marcel A. ; Bakkers, Erik P.A.M. ; Kouwenhoven, Leo P. / Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas. In: Nano Letters. 2018 ; Vol. 18, No. 10. pp. 6483-6488.
@article{50a90d44abd248df8130e1670a3a6c8c,
title = "Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas",
abstract = "Low dimensional semiconducting structures with strong spin-orbit interaction (SOI) and induced superconductivity attracted great interest in the search for topological superconductors. Both the strong SOI and hard superconducting gap are directly related to the topological protection of the predicted Majorana bound states. Here we explore the one-dimensional hole gas in germanium silicon (Ge-Si) core-shell nanowires (NWs) as a new material candidate for creating a topological superconductor. Fitting multiple Andreev reflection measurements shows that the NW has two transport channels only, underlining its one-dimensionality. Furthermore, we find anisotropy of the Land{\'e} g-factor that, combined with band structure calculations, provides us qualitative evidence for the direct Rashba SOI and a strong orbital effect of the magnetic field. Finally, a hard superconducting gap is found in the tunneling regime and the open regime, where we use the Kondo peak as a new tool to gauge the quality of the superconducting gap.",
keywords = "g-factor anisotropy, hole transport, Josephson junction, multiple Andreev reflection, nanowires, Spin-orbit interaction",
author = "{de Vries}, {Folkert K.} and Jie Shen and Skolasinski, {Rafal J.} and Nowak, {Michal P.} and Daniel Varjas and Lin Wang and Michael Wimmer and Joost Ridderbos and Zwanenburg, {Floris A.} and Ang Li and Sebastian Koelling and Verheijen, {Marcel A.} and Bakkers, {Erik P.A.M.} and Kouwenhoven, {Leo P.}",
year = "2018",
month = "9",
day = "7",
doi = "10.1021/acs.nanolett.8b02981",
language = "English",
volume = "18",
pages = "6483--6488",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "10",

}

de Vries, FK, Shen, J, Skolasinski, RJ, Nowak, MP, Varjas, D, Wang, L, Wimmer, M, Ridderbos, J, Zwanenburg, FA, Li, A, Koelling, S, Verheijen, MA, Bakkers, EPAM & Kouwenhoven, LP 2018, 'Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas', Nano Letters, vol. 18, no. 10, pp. 6483-6488. https://doi.org/10.1021/acs.nanolett.8b02981

Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas. / de Vries, Folkert K.; Shen, Jie; Skolasinski, Rafal J.; Nowak, Michal P.; Varjas, Daniel; Wang, Lin; Wimmer, Michael; Ridderbos, Joost; Zwanenburg, Floris A.; Li, Ang; Koelling, Sebastian; Verheijen, Marcel A.; Bakkers, Erik P.A.M.; Kouwenhoven, Leo P.

In: Nano Letters, Vol. 18, No. 10, 07.09.2018, p. 6483-6488.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas

AU - de Vries, Folkert K.

AU - Shen, Jie

AU - Skolasinski, Rafal J.

AU - Nowak, Michal P.

AU - Varjas, Daniel

AU - Wang, Lin

AU - Wimmer, Michael

AU - Ridderbos, Joost

AU - Zwanenburg, Floris A.

AU - Li, Ang

AU - Koelling, Sebastian

AU - Verheijen, Marcel A.

AU - Bakkers, Erik P.A.M.

AU - Kouwenhoven, Leo P.

PY - 2018/9/7

Y1 - 2018/9/7

N2 - Low dimensional semiconducting structures with strong spin-orbit interaction (SOI) and induced superconductivity attracted great interest in the search for topological superconductors. Both the strong SOI and hard superconducting gap are directly related to the topological protection of the predicted Majorana bound states. Here we explore the one-dimensional hole gas in germanium silicon (Ge-Si) core-shell nanowires (NWs) as a new material candidate for creating a topological superconductor. Fitting multiple Andreev reflection measurements shows that the NW has two transport channels only, underlining its one-dimensionality. Furthermore, we find anisotropy of the Landé g-factor that, combined with band structure calculations, provides us qualitative evidence for the direct Rashba SOI and a strong orbital effect of the magnetic field. Finally, a hard superconducting gap is found in the tunneling regime and the open regime, where we use the Kondo peak as a new tool to gauge the quality of the superconducting gap.

AB - Low dimensional semiconducting structures with strong spin-orbit interaction (SOI) and induced superconductivity attracted great interest in the search for topological superconductors. Both the strong SOI and hard superconducting gap are directly related to the topological protection of the predicted Majorana bound states. Here we explore the one-dimensional hole gas in germanium silicon (Ge-Si) core-shell nanowires (NWs) as a new material candidate for creating a topological superconductor. Fitting multiple Andreev reflection measurements shows that the NW has two transport channels only, underlining its one-dimensionality. Furthermore, we find anisotropy of the Landé g-factor that, combined with band structure calculations, provides us qualitative evidence for the direct Rashba SOI and a strong orbital effect of the magnetic field. Finally, a hard superconducting gap is found in the tunneling regime and the open regime, where we use the Kondo peak as a new tool to gauge the quality of the superconducting gap.

KW - g-factor anisotropy

KW - hole transport

KW - Josephson junction

KW - multiple Andreev reflection

KW - nanowires

KW - Spin-orbit interaction

UR - http://www.scopus.com/inward/record.url?scp=85053915173&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.8b02981

DO - 10.1021/acs.nanolett.8b02981

M3 - Article

C2 - 30192147

AN - SCOPUS:85053915173

VL - 18

SP - 6483

EP - 6488

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 10

ER -

de Vries FK, Shen J, Skolasinski RJ, Nowak MP, Varjas D, Wang L et al. Spin-orbit interaction and induced superconductivity in a one-dimensional hole gas. Nano Letters. 2018 Sep 7;18(10):6483-6488. https://doi.org/10.1021/acs.nanolett.8b02981