Apparent violation of the Wiedemann-Franz law near a magnetic field tuned metal-antiferromagnetic quantum critical point.
← Research streamCalculations for a layered metal with Fermi-liquid quasiparticles inelastically scattered by two-dimensional antiferromagnetic spin fluctuations show linear-in-temperature interlayer electrical and thermal resistivity over a broad range. Extrapolation from th…
Study snapshot
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.
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
Calculations for a layered metal with Fermi-liquid quasiparticles inelastically scattered by two-dimensional antiferromagnetic spin fluctuations show linear-in-temperature interlayer electrical and thermal resistivity over a broad range. Extrapolation from this linear-T regime to zero temperature can appear to violate the Wiedemann-Franz law, but the law is recovered below a low-temperature scale that becomes small near the critical point; the results are stated to describe measurements on CeCoIn5 near a magnetic-field-induced quantum phase transition.
Outcomes measured
- electrical resistivity
- thermal resistivity
- Wiedemann-Franz law behavior near a quantum critical point
Limitations
- The abstract describes theoretical calculations and does not report new experimental data.
- No quantitative effect sizes, parameter values, or uncertainty estimates are provided in the abstract.
View raw extracted JSON
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"main_findings": "Calculations for a layered metal with Fermi-liquid quasiparticles inelastically scattered by two-dimensional antiferromagnetic spin fluctuations show linear-in-temperature interlayer electrical and thermal resistivity over a broad range. Extrapolation from this linear-T regime to zero temperature can appear to violate the Wiedemann-Franz law, but the law is recovered below a low-temperature scale that becomes small near the critical point; the results are stated to describe measurements on CeCoIn5 near a magnetic-field-induced quantum phase transition.",
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}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.1103/physrevlett.101.266403
PubMed: 19437656