Possible Pressure Waves of Supersolid Helium at High Pressure
Abstract
We make comments on Kim and Chan's [ Phys. Rev. Lett. 97, 115302 (2006)] letter. Based on their pressure-dependent measurements (by a torsional oscillator technique), we propose that the supersolid fraction (s/) might be relevant to an sound absorption or attenuation (fluctuations of pressure waves) in microscopic domain since there is no apparent change in Tc with pressure.
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