High-Magnetic-Field Lattice Length Changes in URu2Si2

被引:18
作者
Correa, V. F. [1 ,2 ]
Francoual, S. [3 ]
Jaime, M. [3 ]
Harrison, N. [3 ]
Murphy, T. P. [4 ]
Palm, E. C. [4 ]
Tozer, S. W. [4 ]
Lacerda, A. H. [5 ]
Sharma, P. A. [3 ]
Mydosh, J. A. [6 ]
机构
[1] Ctr Atom Bariloche CNEA, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[2] Inst Balseiro UN Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[3] Los Alamos Natl Lab, MPA CMMS, Los Alamos, NM 87545 USA
[4] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[5] Los Alamos Natl Lab, LANSCE, Los Alamos, NM 87545 USA
[6] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands
基金
美国国家科学基金会;
关键词
ELECTRON SUPERCONDUCTOR URU2SI2; HIDDEN-ORDER TRANSITION; QUANTUM CRITICALITY; NEUTRON-SCATTERING; FERMI-SURFACE; EXCITATIONS; SR3RU2O7; SYSTEM;
D O I
10.1103/PhysRevLett.109.246405
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report high-magnetic-field (up to 45 T) (c) over cap -axis thermal-expansion and magnetostriction experiments on URu2Si2 single crystals. The sample length change Delta L-c(T-HO)/L-c associated with the transition to the "hidden order'' phase becomes increasingly discontinuous as the magnetic field is raised above 25 T. The reentrant ordered phase III is clearly observed in both the thermal expansion Delta L-c(T)/L-c and magnetostriction Delta L-c(B)/L-c above 36 T, in good agreement with previous results. The sample length is also discontinuous at the boundaries of this phase, mainly at the upper boundary. A change in the sign of the coefficient of thermal expansion alpha(c) = 1/L-c (partial derivative Delta L-c/partial derivative T) is observed at the metamagnetic transition (B-M similar to 38 T), which is likely related to the existence of a quantum critical end point. DOI: 10.1103/PhysRevLett.109.246405
引用
收藏
页数:5
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