Phys. Rev. Lett. 97, 115302 (2006) [4 pages]Supersolid Helium at High PressureReceived 26 May 2006; published 14 September 2006 We have measured the pressure dependence of the supersolid fraction by a torsional oscillator technique. Superflow is found from 25.6 bar up to 136.9 bar. The supersolid fraction in the low temperature limit increases from 0.6% at 25.6 bar near the melting boundary up to a maximum of 1.5% near 55 bar before showing a monotonic decrease with pressure extrapolating to zero near 170 bar. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.115302
DOI:
10.1103/PhysRevLett.97.115302
PACS:
67.80.−s, 66.30.−h, 66.35.+a, 67.90.+z
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