Superfluidity with disorder in a thin film of quantum gas

We investigate the properties of a strongly interacting superfluid gas of 6Li2 Feshbach molecules forming a thin film confined in a quasi-two-dimensional channel with a tunable random potential, creating a microscopic disorder. We measure the atomic current, extract the resistance of the film in a two-terminal configuration, and identify a superfluid state at low disorder strength, which evolves into a normal poorly conducting state for strong disorder. The transition takes place when the chemical potential reaches the percolation threshold of the disorder. The evolution of the conduction properties contrasts with the smooth behavior of the density and compressibility across the transition, measured in situ at equilibrium. These features suggest the emergence of a glasslike phase at strong disorder.


Published in:
PHYSICAL REVIEW LETTERS, 110, 10, 601
Year:
2013
Publisher:
American Physical Society
ISSN:
0031-9007
Laboratories:




 Record created 2017-03-16, last modified 2018-03-17

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Erratum_ PhysRevLett.112.119901 - Download fulltextPDF
PhysRevLett.110.100601 - Download fulltextPDF
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