title: Supersolid helium at high pressure.
abstract: 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.
authors.affiliation: Department of Physics, the Pennsylvania State University, University Park, Pennsylvania 16802, USA. eunseong@kaist.ac.kr
authors.forename: E
authors.initials: E
authors.lastname: Kim
authors.forename: M H W
authors.initials: MH
authors.lastname: Chan