TY - JOUR
T1 - Heat capacity of liquid 4He confined in a nanoporous glass
AU - Yamamoto, Keiichi
AU - Shibayama, Yoshiyuki
AU - Shirahama, Keiya
N1 - Funding Information:
Acknowledgements This work is supported by the Grant-in-Aid for Scientific Research on Priority Areas “Physics of Super-clean Materials” from MEXT, Japan, and Grant-in-Aid for Scientific Research (A) from JSPS. K.Y. acknowledges the support by Research Fellowships of the JSPS for Young Scientists.
PY - 2008/2
Y1 - 2008/2
N2 - We report a preliminary study of heat capacities of 4He 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.
AB - We report a preliminary study of heat capacities of 4He 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.
KW - Bose-Einstein condensation
KW - Porous media
KW - Quantum phase transition
KW - Superfluidity
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U2 - 10.1007/s10909-007-9554-z
DO - 10.1007/s10909-007-9554-z
M3 - Article
AN - SCOPUS:38549099158
SN - 0022-2291
VL - 150
SP - 353
EP - 357
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 3-4
ER -