Recent torsional oscillator measurements on solid 4He confined in Vycor glass at 62 bars show supersolid response, an abrupt drop in rotational moment of inertia, at 175 mK1. We have investigated the pore-size dependence of the supersolid behavior by confining solid 4He in a different porous host, porous gold, of a considerably larger pore diameter. When solid 4He in porous gold is cooled below 0.2 K a sharp drop in the resonant period is found. The supersolid response exhibits a strong dependence on the amplitude of oscillation.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics