Experimental realization of superconducting quantum interference devices with topological insulator junctions

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

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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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Keywords

  • METIS-286920
  • IR-83582

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