Search for supersolidity in solid 4He using multiple-mode torsional oscillators

  title={Search for supersolidity in solid 4He using multiple-mode torsional oscillators},
  author={Anna Eyal and Xiao Mi and Artem V. Talanov and John D. Reppy},
  journal={Proceedings of the National Academy of Sciences},
  pages={E3203 - E3212}
  • A. Eyal, X. Mi, +1 author J. Reppy
  • Published 24 May 2016
  • Physics, Medicine
  • Proceedings of the National Academy of Sciences
Significance The concept of a supersolid state in solid 4He was first suggested in 1968, yet it was only in 2004 that experimental evidence for the existence of this new state of matter was presented. The possible discovery of the long-sought supersolid state created much excitement and was followed, however, by experimental and theoretical work that suggested that the original interpretation was not satisfactory. It is now clear that many of the originally observed signals can be explained by… Expand
3 Citations
Magnetization plateaus and supersolid phases in an extended Shastry–Sutherland model
Abstract New magnetization plateaus and supersolid phases are identified in an extended Shastry–Sutherland model – with additional longer range interactions and exchange anisotropy – over a wideExpand
Anomalous viscosity transition of solid He-4 in nanodomains
Verified theory of absolute reaction rate or transition-state (originates from the quantum chemistry approach) as well as boundary perturbation method were applied to capturing the possible jump ofExpand
Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia
Using a dipolar gas of dysprosium atoms, a peculiar rotational oscillation mode in a harmonic potential, the scissors mode, is studied, providing direct evidence of the superfluid nature of the dipolar supersolid. Expand


Evidence of Supersolidity in Rotating Solid Helium
Measurements on rotating frozen helium support the formation of a quantum, or supersolid, phase, and superimposing rotation onto oscillatory measurements may distinguish between supersolidity and classical effects. Expand
In Pursuit of the Elusive Supersolid
The excitement following the initial report of supersolid behavior for 4He embedded in porous Vycor glass has been tempered by the realization that many of the early supersolid observations wereExpand
A Gross-Pitaevskii Treatment for Supersolid Helium
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
Observation of Non-Classical Rotational Inertia in Bulk Solid 4He
Abstract In recent torsional oscillator experiments by Kim and Chan (KC), a decrease of rotational inertia has been observed in solid 4He in porous materials (Kim, E., Chan, M.H.W. in Nature 427:225,Expand
Upper limit of supersolidity in solid helium
The resonant period drop observed at low temperatures in torsional oscillators containing solid helium had been interpreted as a signature of supersolid. However, it was found that the shear modulusExpand
Observation of classical rotational inertia and nonclassical supersolid signals in solid 4He below 250 mK.
The nonclassical rotational inertia signal is not a universal property of solid 4He but can be eliminated through an annealing of the solid helium sample, which has important implications for the understanding of the supersolid state. Expand
Anomalous behavior of solid 4He in porous Vycor glass.
  • X. Mi, J. Reppy
  • Materials Science, Medicine
  • Physical review letters
  • 2012
It is found that the signals observed for the solid display a marked period dependence not seen in the case of the superfluid film, suggesting that the low temperature response of solid (4)He in Vycor is more complex than previously assumed and cannot be thought of as a simple superfluid. Expand
Low-temperature shear modulus changes in solid 4He and connection to supersolidity
A measurement of the shear modulus of solid 4He at low frequencies and strains is reported, to explain this unusual elastic behaviour in terms of a dislocation network that is pinned by 3He at the lowest temperatures but becomes mobile above 100 mK. Expand
Fate of vacancy-induced supersolidity in 4He.
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
Interpreting Torsional Oscillator Measurements: Effect of Shear Modulus and Supersolidity
The torsional oscillator is the chief instrument for investigating supersolidity in solid 4He. These oscillators can be sensitive to the elastic properties of the solid helium, which show anomaliesExpand