Local stress and superfluid properties of solid 4He

被引：73

作者：

Pollet, L. ^{[1
]}

Boninsegni, M. ^{[2
]}

Kuklov, A. B. ^{[3
]}

Prokof'ev, N. V. ^{[1
,4
,5
]}

Svistunov, B. V. ^{[4
,5
]}

Troyer, M. ^{[1
]}

机构：

[1] ETH, CH-8093 Zurich, Switzerland

[2] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[3] CUNY Coll Staten Isl, Dept Engn Sci & Phys, Staten Isl, NY 10314 USA

[4] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[5] Russian Res Ctr Kurchatov Inst, Moscow 123182, Russia

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 09期

基金：

美国国家科学基金会; 瑞士国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.097202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We provide a semiquantitative tool, derived from first-principles simulations, for answering the question of whether certain types of defects in solid (4)He support mass superflow. Although ideal crystals of (4)He are not supersolid, the gap for vacancy creation closes when applying a moderate stress. While a homogeneous system becomes unstable at this point, the stressed core of crystalline defects (dislocations and grain boundaries) can turn superfluid.

引用

页数：4

共 32 条

[1]

ANDREEV AF, 1969, SOV PHYS JETP-USSR, V29, P1107

[2] Oscillation frequency dependence of nonclassical rotation inertia of solid 4He [J].