New chiral phases of superfluid 3He stabilized by anisotropic silica aerogel

被引：0

作者：

Pollanen, J. ^{[1
]}

Li, J. I. A. ^{[1
]}

Collett, C. A. ^{[1
]}

Gannon, W. J. ^{[1
]}

Halperin, W. P. ^{[1
]}

Sauls, J. A. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

来源：

NATURE PHYSICS | 2012年 / 8卷 / 04期

基金：

美国国家科学基金会;

关键词：

STATE;

D O I：

10.1038/NPHYS2220

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A rich variety of Fermi systems condense by forming bound pairs, including high-temperature(1) and heavy-fermion(2) superconductors, Sr2RuO4 (ref. 3), cold atomic gases(4) and superfluid He-3 (ref. 5). Some of these form exotic quantum states with non-zero orbital angular momentum. We have discovered, in the case of He-3, that anisotropic disorder, engineered from highly porous silica aerogel, stabilizes a chiral superfluid state that otherwise would not exist. Furthermore, we find that the chiral axis of this state can be uniquely oriented with the application of a magnetic field perpendicular to the aerogel anisotropy axis. At sufficiently low temperature we observe a sharp transition from a uniformly oriented chiral state to a disordered structure consistent with locally ordered domains, contrary to expectations for a superfluid glass phase(6).

引用

页码：317 / 320

页数：4