期刊
JOURNAL OF LOW TEMPERATURE PHYSICS
卷 150, 期 3-4, 页码 353-357出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-007-9554-z
关键词
superfluidity; bose-Einstein condensation; quantum phase transition; porous media
We report a preliminary study of heat capacities of He-4 confined in a nanoporous Gelsil glass that has nanopores of 2.5 nm in diameter. The heat capacity has a broad peak at a temperature far above the superfluid transition temperature obtained by torsional oscillator technique. The heat-capacity peak is attributed to formation of localized Bose-Einstein Condensates in the nanopores, in which the long-range superfluid coherence is destroyed by pore size distribution or random potential inherent to the porous glass.
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