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Geometric dependence of Nb-Bi2Te3-Nb topological Josephson junction transport parameters

Journal Article


Abstract


  • Superconductor-topological insulator-superconductor Josephson junctions have been fabricated in order to study the width dependence of the critical current, normal state resistance and flux periodicity of the critical current modulation in an external field. Previous literature reports suggest anomalous scaling in topological junctions due to the presence of Majorana bound states. However, for most realized devices, one would expect that trivial 2-periodic Andreev levels dominate transport. We also observe anomalous scaling behaviour of junction parameters, but the scaling can be well explained by mere geometric effects, such as the parallel bulk conductivity shunt and flux focusing.

UOW Authors


  •   Molenaar, C G. (external author)
  •   Leusink, D P. (external author)
  •   Wang, Xiaolin
  •   Brinkman, A (external author)

Publication Date


  • 2014

Citation


  • Molenaar, C. G., Leusink, D. P., Wang, X. L. & Brinkman, A. (2014). Geometric dependence of Nb-Bi2Te3-Nb topological Josephson junction transport parameters. Superconductor Science and Technology, 27 (10), 104003-1-104003-6.

Scopus Eid


  • 2-s2.0-84907223073

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1253

Has Global Citation Frequency


Start Page


  • 104003-1

End Page


  • 104003-6

Volume


  • 27

Issue


  • 10

Place Of Publication


  • United Kingdom

Abstract


  • Superconductor-topological insulator-superconductor Josephson junctions have been fabricated in order to study the width dependence of the critical current, normal state resistance and flux periodicity of the critical current modulation in an external field. Previous literature reports suggest anomalous scaling in topological junctions due to the presence of Majorana bound states. However, for most realized devices, one would expect that trivial 2-periodic Andreev levels dominate transport. We also observe anomalous scaling behaviour of junction parameters, but the scaling can be well explained by mere geometric effects, such as the parallel bulk conductivity shunt and flux focusing.

UOW Authors


  •   Molenaar, C G. (external author)
  •   Leusink, D P. (external author)
  •   Wang, Xiaolin
  •   Brinkman, A (external author)

Publication Date


  • 2014

Citation


  • Molenaar, C. G., Leusink, D. P., Wang, X. L. & Brinkman, A. (2014). Geometric dependence of Nb-Bi2Te3-Nb topological Josephson junction transport parameters. Superconductor Science and Technology, 27 (10), 104003-1-104003-6.

Scopus Eid


  • 2-s2.0-84907223073

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1253

Has Global Citation Frequency


Start Page


  • 104003-1

End Page


  • 104003-6

Volume


  • 27

Issue


  • 10

Place Of Publication


  • United Kingdom