SIZE-DEPENDENT KOSTERLITZ-THOULESS SUPERFLUID TRANSITION IN THIN HE-4 FILMS ADSORBED ON POROUS GLASSES

被引：78

作者：

SHIRAHAMA, K ^{[1
]}

KUBOTA, M ^{[1
]}

OGAWA, S ^{[1
]}

WADA, N ^{[1
]}

WATANABE, T ^{[1
]}

机构：

[1] HOKKAIDO UNIV, FAC SCI, DEPT PHYS, SAPPORO, HOKKAIDO 060, JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.64.1541

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first quantitative study of the size-dependent suprefluid transition in He4 films adsorbed on porous glasses with pore diameters d from 50 to 10 000. Tc for the submonolayer films decreases as d increases up to d=2900, whereas Tc for the full-pore liquid increases with d. The d dependence of Tc and the dissipation at the transition for the films reveal that the vortex-pair unbinding on length scales smaller than the pore sizes determines the superfluid transition. We obtain the diameter of vortex core a0=25±12 from the fit by letting the 2D coherence length 2+(Tc)=d/2. AE © 1990 The American Physical Society.

引用

页码：1541 / 1544

页数：4

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