Symmetry-Breaking Lattice Distortion in Sr3Ru2O7

被引：30

作者：

Stingl, C. ^{[1
]}

Perry, R. S. ^{[2
,3
,4
]}

Maeno, Y. ^{[3
,4
]}

Gegenwart, P. ^{[1
]}

机构：

[1] Univ Gottingen, Inst Phys 1, D-37077 Gottingen, Germany

[2] Univ Edinburgh, Sch Phys, Scottish Univ Phys Alliance, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Kyoto Univ, Int Innovat Ctr, Kyoto 6068501, Japan

[4] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

QUANTUM CRITICALITY; PHASE; SUPERCONDUCTOR; ANISOTROPY;

D O I：

10.1103/PhysRevLett.107.026404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic nematic phase of Sr3Ru2O7 is investigated by high-resolution in-plane thermal expansion measurements in magnetic fields close to 8 T applied at various angles Theta off the c axis. At Theta < 10 degrees we observe a very small (10(-7)) lattice distortion which breaks the fourfold in-plane symmetry, resulting in nematic domains with interchanged a and b axis. At Theta greater than or similar to 10 degrees the domains are almost fully aligned and thermal expansion indicates an area-preserving lattice distortion of order 2 x 10(-6) which is likely related to orbital ordering. Since the system is located in the immediate vicinity of a metamagnetic quantum critical end point, the results represent the first observation of a structural relaxation driven by quantum criticality.

引用

页数：4

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