Experimental realization of superconducting quantum interference devices with topological insulator junctions

M. Veldhorst, C.G. Molenaar, X.L. Wang, H. Hilgenkamp, Alexander Brinkman

Research output: Contribution to journalArticleAcademicpeer-review

46 Citations (Scopus)

Abstract

We demonstrate topological insulator (Bi2Te3) dc SQUIDs, based on superconductingNb leads coupled to nano-fabricated Nb-Bi2Te3-Nb Josephson junctions. The high reproducibility and controllability of the fabrication process allow the creation of dc SQUIDs with parameters that are in agreement with design values. Clear critical current modulation of both the junctions and the SQUID with applied magnetic fields have been observed. We show that the SQUIDs have a periodicity in the voltage-flux characteristic of Φ0 of relevance to the ongoing pursuit of realizing interferometers for the detection of Majorana fermions in superconductor—topological insulator structures.
Original languageEnglish
Article number072602
Pages (from-to)072602-1-072602-3
Number of pages3
JournalApplied physics letters
Volume100
Issue number7
DOIs
Publication statusPublished - 2012

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insulators
interference
controllability
Josephson junctions
periodic variations
critical current
interferometers
fermions
modulation
fabrication
electric potential
magnetic fields

Keywords

  • METIS-286920
  • IR-83582

Cite this

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Experimental realization of superconducting quantum interference devices with topological insulator junctions. / Veldhorst, M.; Molenaar, C.G.; Wang, X.L.; Hilgenkamp, H.; Brinkman, Alexander.

In: Applied physics letters, Vol. 100, No. 7, 072602, 2012, p. 072602-1-072602-3.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Experimental realization of superconducting quantum interference devices with topological insulator junctions

AU - Veldhorst, M.

AU - Molenaar, C.G.

AU - Wang, X.L.

AU - Hilgenkamp, H.

AU - Brinkman, Alexander

PY - 2012

Y1 - 2012

N2 - We demonstrate topological insulator (Bi2Te3) dc SQUIDs, based on superconductingNb leads coupled to nano-fabricated Nb-Bi2Te3-Nb Josephson junctions. The high reproducibility and controllability of the fabrication process allow the creation of dc SQUIDs with parameters that are in agreement with design values. Clear critical current modulation of both the junctions and the SQUID with applied magnetic fields have been observed. We show that the SQUIDs have a periodicity in the voltage-flux characteristic of Φ0 of relevance to the ongoing pursuit of realizing interferometers for the detection of Majorana fermions in superconductor—topological insulator structures.

AB - We demonstrate topological insulator (Bi2Te3) dc SQUIDs, based on superconductingNb leads coupled to nano-fabricated Nb-Bi2Te3-Nb Josephson junctions. The high reproducibility and controllability of the fabrication process allow the creation of dc SQUIDs with parameters that are in agreement with design values. Clear critical current modulation of both the junctions and the SQUID with applied magnetic fields have been observed. We show that the SQUIDs have a periodicity in the voltage-flux characteristic of Φ0 of relevance to the ongoing pursuit of realizing interferometers for the detection of Majorana fermions in superconductor—topological insulator structures.

KW - METIS-286920

KW - IR-83582

U2 - 10.1063/1.3686150

DO - 10.1063/1.3686150

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JO - Applied physics letters

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