A parity-breaking electronic nematic phase transition in the spin-orbit coupled metal Cd2Re2O7

被引：103

作者：

Harter, J. W. ^{[1
,2
]}

Zhao, Z. Y. ^{[3
,4
]}

Yan, J. -Q. ^{[3
,5
]}

Mandrus, D. G. ^{[3
,5
]}

Hsieh, D. ^{[1
,2
]}

机构：

[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[2] CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[4] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[5] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

SCIENCE | 2017年 / 356卷 / 6335期

基金：

美国国家科学基金会;

关键词：

PYROCHLORE OXIDE CD2RE2O7; LANDAU-LEVELS; SUPERCONDUCTOR; STATE; ORDER; ANISOTROPY;

D O I：

10.1126/science.aad1188

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Strong electron interactions can drive metallic systems toward a variety of well-known symmetry-broken phases, but the instabilities of correlated metals with strong spin-orbit coupling have only recently begun to be explored. We uncovered a multipolar nematic phase of matter in the metallic pyrochlore Cd2Re2O7 using spatially resolved secondharmonic optical anisotropy measurements. Like previously discovered electronic nematic phases, this multipolar phase spontaneously breaks rotational symmetry while preserving translational invariance. However, it has the distinguishing property of being odd under spatial inversion, which is allowed only in the presence of spin-orbit coupling. By examining the critical behavior of the multipolar nematic order parameter, we show that it drives the thermal phase transition near 200 kelvin in Cd2Re2O7 and induces a parity-breaking lattice distortion as a secondary order.

引用

页码：295 / 297

页数：4

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