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Article overview
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Superfluid interfaces in quantum solids | | Evgeni Burovski
; Evgeni Kozik
; Anatoly Kuklov
; Nikolay Prokof’ev
; Boris Svistunov
; | | Date: |
29 Apr 2005 | | Journal: | Phys Rev Lett, 94 (16), 165301 | | Abstract: | 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. | | Source: | PubMed, pmid15904238 | | Services: | Forum | Review | Favorites | |
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