Apparent Violation of the Wiedemann-Franz Law near a Magnetic Field Tuned Metal-Antiferromagnetic Quantum Critical Point

Smith, M. F. and McKenzie, Ross H. (2008) Apparent Violation of the Wiedemann-Franz Law near a Magnetic Field Tuned Metal-Antiferromagnetic Quantum Critical Point. Physical Review Letters, 101 26: 266403-1-266403-4. doi:10.1103/PhysRevLett.101.266403

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Author Smith, M. F.
McKenzie, Ross H.
Title Apparent Violation of the Wiedemann-Franz Law near a Magnetic Field Tuned Metal-Antiferromagnetic Quantum Critical Point
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2008-12-30
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.101.266403
Open Access Status File (Publisher version)
Volume 101
Issue 26
Start page 266403-1
End page 266403-4
Total pages 4
Editor G. Basbas
J. Sandweiss
R. B. Schuhmann
S. G. Brown
Place of publication United States
Publisher American Physical Society
Collection year 2009
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
020699 Quantum Physics not elsewhere classified
Abstract The temperature dependences of the interlayer electrical and thermal resistivity in a layered metal are calculated for Fermi liquid quasiparticles which are scattered inelastically by two-dimensional antiferromagnetic spin fluctuations. Both resistivities have a linear temperature dependence over a broad temperature range. Extrapolations to zero temperature made from this linear-T range give values that appear to violate the Wiedemann-Franz law. However, below a low-temperature scale, which becomes small close to the critical point, a recovery of this law occurs. Our results describe recent measurements on CeCoIn5 near a magnetic field-induced quantum phase transition. Hence, the experiments do not necessarily imply a non-Fermi liquid ground state.
Keyword Kondo-lattice
cecoin5
systems
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
 
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Created: Fri, 03 Apr 2009, 13:09:28 EST by Jo Hughes on behalf of School of Mathematics & Physics