Disorder and the Supersolid State of Solid He4

  title={Disorder and the Supersolid State of Solid He4},
  author={A. S. Rittner and J. Reppy},
  journal={Physical Review Letters},
We report torsional oscillator supersolid studies of highly disordered samples of solid $^{4}\mathrm{He}$. In an attempt to approach the amorphous or glassy state of the solid, we prepare our samples by rapid freezing from the normal phase of liquid $^{4}\mathrm{He}$. Less than two minutes is required for the entire process of freezing and the subsequent cooling of the sample to below 1 K. The supersolid signals observed for such samples are remarkably large, exceeding 20% of the entire solid… Expand
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