Measuring angular momentum of p(x) + ip(y) topological superfluids: A proposal

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Topological superconductors are among the most actively studied materials these days. They are a promising candidate for hosting Majorana fermions either on their boundaries or in vortex cores. Detecting one-dimensional (1D) edge current around the periphery of a 2D p(x) + ip(y) superconductor would be a hallmark signature of topological superconductivity, but Majorana fermions are not amenable to electronic current measurements due to their charge-neutral nature. Thermal conductivity measurements, such as the thermal Hall effect, are alternatively proposed, but material synthesis must come first. Superfluid He-3-A, on the other hand, is a known px + ipy superfluid whose angular momentum generated by the edge current can be measured with a gyroscopic technique. Here, we propose a microelectromechanical system based gyroscope that will not only have enough signal sensitivity to measure the angular momentum but also be used to observe dimensionality induced phase transitions between different topological superfluids.
Publisher
AMER PHYSICAL SOC
Issue Date
2018-07
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW B, v.98, no.2, pp.024518

ISSN
2469-9950
DOI
10.1103/PhysRevB.98.024518
URI
http://hdl.handle.net/10203/245204
Appears in Collection
PH-Journal Papers(저널논문)
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