Superfluid Interfaces in Quantum Solids

Burovski, Evgeni and Kozik, Evgeny and Kuklov, Anatoly and Prokof'ev, Nikolay and Svistunov, Boris (2005) Superfluid Interfaces in Quantum Solids. Physical review letters, 94 (16): 165301. ISSN 1079-7114

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One scenario for the nonclassical moment of inertia of solid 4He discovered by Kim and Chan [ Nature (London) 427 225 (2004)] is the superfluidity of microcrystallite interfaces. On the basis of the most simple model of a quantum crystal—the checkerboard lattice solid—we show that the superfluidity of interfaces between solid domains can exist in a wide range of parameters. At strong enough interparticle interaction, a superfluid interface becomes an insulator via a quantum phase transition. Under the conditions of particle-hole symmetry, the transition is of the standard U(1) universality class in 3D, while in 2D the onset of superfluidity is accompanied by the interface roughening, driven by fractionally charged topological excitations.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
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© 2005 The American Physical Society
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?? physics and astronomy(all) ??
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Deposited On:
27 Feb 2013 16:44
Last Modified:
31 Dec 2023 00:26