Yb2Sn2O7: A magnetic Coulomb liquid at a quantum critical point

被引：26

作者：

Dun, Z. L. ^{[1
]}

Choi, E. S. ^{[2
]}

Zhou, H. D. ^{[1
,2
]}

Hallas, A. M. ^{[3
]}

Silverstein, H. J. ^{[3
]}

Qiu, Y. ^{[4
,5
]}

Copley, J. R. D. ^{[4
]}

Gardner, J. S. ^{[4
,6
]}

Wiebe, C. R. ^{[2
,3
,7
]}

机构：

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

[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[3] Univ Manitoba, Dept Chem, Winnipeg, MB R3T 2N2, Canada

[4] NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[5] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[6] Indiana Univ, Bloomington, IN 47408 USA

[7] Univ Winnipeg, Dept Chem, Winnipeg, MB R3B 2E9, Canada

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 13期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

SPIN ICE; MONOPOLES; TRANSITION;

D O I：

10.1103/PhysRevB.87.134408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report neutron scattering and ac susceptibility measurements on the pyrochlore Yb2Sn2O7. The appearance of magnetic diffuse scattering, low-energy spin excitations, and a nearly temperature-independent relaxation time are signatures that the system enters a short-range-ordered regime with quantum dynamics beneath 2 K. ac susceptibility data further suggest that Yb2Sn2O7 enters a long-range magnetically ordered state below 0.11 K. These results suggest that Yb(2)Sn(2)O7 is a ferromagnet with persistent spin dynamics down to 0.05 K. Referencing the phase diagram for Yb pyrochlores, Yb2Sn2O7 is approaching a quantum phase transition near the ferromagnetic ordered critical point. DOI: 10.1103/PhysRevB.87.134408

引用

页数：5

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