97 citations · 288 across the 5 of their papers we have counts for
5 papers
Heat capacity peak in solid 4He: Effects of disorder and 3He impurities
X. Lin, A. C. Clark, Z. G. Cheng +1
Heat capacity measurements with significantly improved resolution find the presence of a peak in a solid 4He sample in coexistence with liquid. With improved crystallinity, the pea…
Thermal History of Solid 4He Under Oscillation
A. C. Clark, J. D. Maynard, M. H. W. Chan
We have studied the thermal history of the resonant frequency of a torsional oscillator containing solid 4He. We find that the magnitude of the frequency shift that occurs below 10…
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…
Search for Superfluidity in Solid Hydrogen
A. C. Clark, X. Lin, M. H. W. Chan
A torsional oscillator study of solid para-hydrogen has been carried out down to 20 mK in search for evidence of superfluidity. This work was inspired by the observation of the sup…