Fragility of surface states in topological superfluid 3He
P. J. Heikkinen (),
A. Casey,
L. V. Levitin,
X. Rojas,
A. Vorontsov,
P. Sharma,
N. Zhelev,
J. M. Parpia and
J. Saunders ()
Additional contact information
P. J. Heikkinen: Royal Holloway University of London
A. Casey: Royal Holloway University of London
L. V. Levitin: Royal Holloway University of London
X. Rojas: Royal Holloway University of London
A. Vorontsov: Montana State University
P. Sharma: Indian Institute of Science
N. Zhelev: Cornell University
J. M. Parpia: Cornell University
J. Saunders: Royal Holloway University of London
Nature Communications, 2021, vol. 12, issue 1, 1-8
Abstract:
Abstract Superfluid 3He, with unconventional spin-triplet p-wave pairing, provides a model system for topological superconductors, which have attracted significant interest through potential applications in topologically protected quantum computing. In topological insulators and quantum Hall systems, the surface/edge states, arising from bulk-surface correspondence and the momentum space topology of the band structure, are robust. Here we demonstrate that in topological superfluids and superconductors the surface Andreev bound states, which depend on the momentum space topology of the emergent order parameter, are fragile with respect to the details of surface scattering. We confine superfluid 3He within a cavity of height D comparable to the Cooper pair diameter ξ0. We precisely determine the superfluid transition temperature Tc and the suppression of the superfluid energy gap, for different scattering conditions tuned in situ, and compare to the predictions of quasiclassical theory. We discover that surface magnetic scattering leads to unexpectedly large suppression of Tc, corresponding to an increased density of low energy bound states.
Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (5)
Downloads: (external link)
https://www.nature.com/articles/s41467-021-21831-y Abstract (text/html)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21831-y
Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/
DOI: 10.1038/s41467-021-21831-y
Access Statistics for this article
Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie
More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().