Heat capacity peak in solid 4He: Effects of disorder and 3He impurities
arXiv:0903.1898 · doi:10.1103/PhysRevLett.102.125302
Abstract
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 peak decreases in height and moves to lower temperature. A hysteretic heat capacity signature consistent with 3He-4He phase separation, not detected in an earlier work is clearly observed.
14 pages, 3 figures