Ginsburg-Landau theory of supersolid

Abstract

We develop a simple Ginsburg-Landau theory to study all the possible phases and phase transitions in ${}^{4}He$, analyze the condition for the existence of the supersolid (SS) and map out its global phase diagram from a unified framework. If the condition favors the existence of the SS, we use the GL theory to address several experimental facts and also make some predictions that are amenable to experimental tests. A key prediction is that the X-ray scattering intensity from the SS ought to have an additional modulation over that of the NS. The modulation amplitude is proportional to the Non-Classical Rotational-Inertial (NCRI) observed in the torsional oscillator experiments.

arXiv comment4+ pages, 1 Fig. Final version to appear in Phys. Rev. Lett

References in corpus (5)

• On the Supersolid State of Matter
• Ring exchanges and the supersolid phase of 4He
• Thermodynamics of an incommensurate quantum crystal
• Squeezing superfluid from a stone: Coupling superfluidity and elasticity in a supersolid
• Bose Einstein Condensation in solid 4He

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