Liquid-Solid Transition and Phase Diagram of ^4He Confined in Nanoporous Glass
Mesoscale and Nanoscale Physics
2015-05-13 v1 Strongly Correlated Electrons
Abstract
We have studied the liquid - solid (L-S) phase transition of ^4He confined in nanoporous glass, which has interconnected nanopores of 2.5 nm in diameter. The L-S boundary is determined by the measurements of pressure and thermal response during slow cooling and warming. Below 1 K, the freezing pressure is elevated to 1.2 MPa from the bulk freezing pressure, and appears to be independent of temperature. The T-independent L-S boundary implies the existence of a localized Bose-Einstein condensation state, in which long-range superfluid coherence is destroyed by narrowness of the nanopores and random potential.
Keywords
Cite
@article{arxiv.0707.2683,
title = {Liquid-Solid Transition and Phase Diagram of ^4He Confined in Nanoporous Glass},
author = {Keiichi Yamamoto and Yoshiyuki Shibayama and Keiya Shirahama},
journal= {arXiv preprint arXiv:0707.2683},
year = {2015}
}
Comments
4 pages, 4 figures, submitted to J. Phys. Soc. Jpn