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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2002     Display Documents



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ID: 17332.0, MPI für Chemische Physik fester Stoffe / publications 2002
Magnetic-Field Induced Quantum Critical Point in YbRh2Si2
Authors:Gegenwart, P.; Custers, J.; Geibel, C.; Neumaier, K.; Tayama, T.; Tenya, K.; Trovarelli, O.; Steglich, F.
Language:English
Date of Publication (YYYY-MM-DD):2002-07-29
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Volume:89
Issue / Number:5
Start Page:056402
End Page:056402
Sequence Number of Article:056402
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:We report low-temperature calorimetric, magnetic, and resistivity measurements on the antiferromagnetic (AF) heavy- fermion metal YbRh2Si2 ( T-N=70 mK) as a function of magnetic field B. While for fields exceeding the critical value B-c0 at which T-N-->0 the low-temperature resistivity shows an AT(2) dependence, a 1/(B-B-c0) divergence of A(B) upon reducing B to B-c0 suggests singular scattering at the whole Fermi surface and a divergence of the heavy quasiparticle mass. The observations are interpreted in terms of a new type of quantum critical point separating a weakly AF ordered from a weakly polarized heavy Landau-Fermi liquid state.
Comment of the Author/Creator:Date: 2002, JUL 29
External Publication Status:published
Document Type:Article
Communicated by:Ina Wanschura
Affiliations:MPI für chemische Physik fester Stoffe
External Affiliations:Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany; Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany; Walther Meissner Inst Tieftemp Forsch, D-85748 Garching, Germany; Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
Identifiers:ISI:000176907500027 [ID No:1]
ISSN:0031-9007 [ID No:2]
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