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Spontaneous Josephson π junctions with topological superconductors

Haim, Arbel (2019) Spontaneous Josephson π junctions with topological superconductors. Physical Review B, 100 (6). Art. No. 064505. ISSN 2469-9950. http://resolver.caltech.edu/CaltechAUTHORS:20190429-075854330

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Abstract

We examine the question of whether a π junction can spontaneously form in a Josephson junction between two topological superconductors. We study a junction between two time-reversal-invariant topological superconductors and show this system goes through a series of multiple transitions between a 0-junction phase, where the free energy has its minimum for a superconducting phase difference of zero, and a π-junction phase, where the free energy has its minimum for a superconducting phase difference of π. These transitions occur in the absence of a Coulomb blockade or magnetic impurities. Rather, they are driven by the spin-orbit coupling in the junction, and can be probed, for example, by measuring the tunneling density of states or the critical current as a function of the junction's length or its Fermi velocity.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevB.100.064505 DOIArticle
https://arxiv.org/abs/1902.03248arXivDiscussion Paper
Alternate Title:Tunable Josephson pi junctions without Coulomb blockade, Tunable Josephson π junctions without Coulomb blockade
Additional Information:© 2019 American Physical Society. Received 10 February 2019; revised manuscript received 15 May 2019; published 6 August 2019. I benefited from discussions with L. Arrachea, F. von Oppen, Y. Oreg, and A. Stern. This research was supported by the Walter Burke Institute for Theoretical Physics at Caltech.
Group:IQIM, Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Issue or Number:6
Record Number:CaltechAUTHORS:20190429-075854330
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190429-075854330
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95061
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Apr 2019 15:56
Last Modified:23 Aug 2019 17:56

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