97 citations · 221 across the 5 of their papers we have counts for
4 papers · 1 filter
He Crystal Quality and Rotational Response in a Transparent Torsional Oscillator
A. D. Fefferman, X. Rojas, A. Haziot +3
We have studied natural purity He single crystals and polycrystals between 10 and 600 mK using a torsional oscillator with a 2 cm rigid cell made of sapphire with a smo…
Supersolid behavior in confined geometry
J. T. West, X. Lin, Z. G. Cheng +1
We have carried out torsional oscillator (TO) and heat capacity (HC) measurements on solid 4He samples grown within a geometry which restricts the helium to thin (150 um) cylindric…
The effect of 3He impurities on the nonclassical response to oscillation of solid 4He
E. Kim, J. S. Xia, J. T. West +3
We have investigated the influence of impurities on the possible supersolid transition by systematically enriching isotopically-pure 4He (< 1 ppb of 3He) with 3He. The onset of non…
Nonclassical Rotational Inertia in Single Crystal Helium
A. C. Clark, J. T. West, M. H. W. Chan
It has been proposed that the observed nonclassical rotational inertia (NCRI) in solid helium results from the superflow of thin liquid films along interconnected grain boundaries…