Experimental realization of SQUIDs with topological insulator junctions

M. Veldhorst; C. G. Molenaar; X. L. Wang; H. Hilgenkamp; A. Brinkman

doi:10.1063/1.3686150

Experimental realization of SQUIDs with topological insulator junctions

Superconductivity 2012-08-23 v1 Strongly Correlated Electrons

Authors: M. Veldhorst , C. G. Molenaar , X. L. Wang , H. Hilgenkamp , A. Brinkman

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Abstract

We demonstrate topological insulator (Bi $_2$ Te $_3$ ) dc SQUIDs, based on superconducting Nb leads coupled to nano-fabricated Nb-Bi $_2$ Te $_3$ -Nb Josephson junctions. The high reproducibility and controllability of the fabrication process allows 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 $\Phi_0$ , of relevance to the ongoing pursuit of realizing interferometers for the detection of Majorana fermions in superconductor- topological insulator structures.

Keywords

SQUID topological insulator Josephson junction Majorana fermions superconducting devices

Cite

@article{arxiv.1112.5858,
  title  = {Experimental realization of SQUIDs with topological insulator junctions},
  author = {M. Veldhorst and C. G. Molenaar and X. L. Wang and H. Hilgenkamp and A. Brinkman},
  journal= {arXiv preprint arXiv:1112.5858},
  year   = {2012}
}

Experimental realization of SQUIDs with topological insulator junctions

Abstract

Keywords

Cite

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