Colloquium: Supersolids: What and where are they?

@article{Boninsegni2012ColloquiumSW,
  title={Colloquium: Supersolids: What and where are they?},
  author={Massimo Boninsegni and Nikolay Prokof'ev},
  journal={Reviews of Modern Physics},
  year={2012},
  volume={84},
  pages={759-776}
}
The ongoing experimental and theoretical effort aimed at understanding nonclassical rotational inertia in solid helium has sparked renewed interest in the supersolid phase of matter, its microscopic origin and character, and its experimental detection. The purpose of this Colloquium is to provide a general theoretical framework for the phenomenon of supersolidity, review some of the experimental evidence for solid $^{4}\mathrm{He}$, and discuss its possible interpretation in terms of physical… Expand

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References

SHOWING 1-10 OF 84 REFERENCES
Fate of vacancy-induced supersolidity in 4He.
TLDR
Using quantum Monte Carlo methods, the long-standing question of vacancy-induced superflow is investigated and it is found that vacancies in a 4He crystal phase separate instead of forming a supersolid. Expand
A Gross-Pitaevskii Treatment for Supersolid Helium
TLDR
It is argued that every pure Bose solid’s ground state is a supersolid, and a study of the temperature-dependent relaxation dynamics of helium shows that defects may play an important role in describing its supersolid behavior. Expand
Solid ^4He and the Supersolid Phase: from Theoretical Speculation to the Discovery of a New State of Matter? : A Review of the Past and Present Status of Research( New Frontiers of Quantum Fluids and Solids)
The possibility of a supersolid state of matter, i.e., a crystalline solid exhibiting superfluid properties, first appeared in theoretical studies about forty years ago. After a long period of littleExpand
Supersolidity and disorder
A solid is called 'supersolid' if it exhibits superfluid properties. Supersolidity is a paradoxical phenomenon whose understanding has become a major challenge since 2004, when Kim and Chan firstExpand
The enigma of supersolidity
TLDR
A 'supersolid' is a quantum solid in which a fraction of the mass is superfluid, but part of its mass is able to flow owing to quantum physical processes. Expand
Two new vortex liquids
In 1967, Reatto and Chester1 proposed that solid helium-4 might exhibit superfluidity, and in 1970, Leggett2 suggested what was thought to be a definitive experimental test: to find non-classicalExpand
Interplay of Rotational, Relaxational, and Shear Dynamics in Solid 4He
TLDR
Using a high-sensitivity torsional oscillator (TO) technique, the rotational and relaxational dynamics of solid helium-4 (4He) are mapped throughout the parameter range of the proposed supersolidity and it is demonstrated that the combined temperature-velocity dependence of the TO response is indistinguishable from the combinedTemperature-strain dependence ofThe solid’s shear modulus. Expand
Supersolid state of matter.
We prove that the necessary condition for a solid to be also a superfluid is to have zero-point vacancies, or interstitial atoms, or both, as an integral part of the ground state. As a consequence,Expand
On the possible "supersolid" character of parahydrogen clusters.
TLDR
It is argued that the cluster (p-H(2))(26) can be regarded as a mesoscopic "supersolid" that arises as clusters melt, that is, become progressively liquid-like as a result of quantum effects. Expand
Quantum lattice gas and the existence of a supersolid
We discuss, within mean field theory, the possible phase diagrams of a quantum lattice gas model (as considered by Matsuda and Tsuneto atT=0) with particular reference to the existence of aExpand
...
1
2
3
4
5
...