Hydrodynamics of spatially ordered superfluids
- 1 March 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 53 (9) , 5670-5682
- https://doi.org/10.1103/physrevb.53.5670
Abstract
We derive the hydrodynamic equations for the supersolid and superhexatic phases of a neutral two-dimensional Bose fluid. We find, assuming that the normal part of the fluid is clamped to an underlying substrate, that both phases can sustain third-sound modes and that in the supersolid phase there are additional modes due to the superfluid motion of point defects (vacancies and interstitials). © 1996 The American Physical Society.Keywords
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