Article (Scientific journals)
Quantum critical 5f electrons avoid singularities in U(Ru,Rh)(2)Si-2
Silhanek, Alejandro; Harrison, N.; Batista, C. D. et al.
2005In Physical Review Letters, 95 (2)
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Keywords :
quantum critical points
Abstract :
[en] We present specific heat measurements of 4% Rh-doped URu2Si2 at magnetic fields around the proposed metamagnetic transition field H(m)similar to 34 T, revealing striking similarities to the isotructural Ce analog CeRu2Si2 for H > H-m. This suggests that strongly renormalized hybridized-band models apply equally well to both systems. The vanishing bandwidths as H -> H-m are consistent with a quantum-critical point close to H-m. The existence of a phase transition into an ordered phase in the vicinity of H-m for 4% Rh-doped URu2Si2, but not for CeRu2Si2, is consistent with a stronger superexchange in the case of the U 5f system. Irreversible processes at the transition indicate a strong coupling of the 5f orbitals to the lattice, most suggestive of electric quadrupolar order.
Disciplines :
Physics
Author, co-author :
Silhanek, Alejandro  ;  Los Alamos National Laboratory (USA)
Harrison, N.
Batista, C. D.
Jaime, M.
Lacerda, A.
Amitsuka, H.
Mydosh, J. A.
Language :
English
Title :
Quantum critical 5f electrons avoid singularities in U(Ru,Rh)(2)Si-2
Publication date :
2005
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
Volume :
95
Issue :
2
Peer reviewed :
Peer Reviewed verified by ORBi
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