TY - JOUR

T1 - Superfluid Interfaces in Quantum Solids

AU - Burovski, Evgeni

AU - Kozik, Evgeny

AU - Kuklov, Anatoly

AU - Prokof'ev, Nikolay

AU - Svistunov, Boris

N1 - © 2005 The American Physical Society

PY - 2005/4/28

Y1 - 2005/4/28

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.94.165301

DO - 10.1103/PhysRevLett.94.165301

M3 - Journal article

VL - 94

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 16

M1 - 165301

ER -