Anomalous Thermal Conductivity of Semi-Metallic Superconductors with Electron-Hole Compensation

Details Anomalous Thermal Conductivity of Semi-Metallic Superconductors with Electron-Hole Compensation Anomalous Thermal Conductivity of Semi-Metallic Superconductors with Electron-Hole Compensation

2007-10-16

arxiv.org/abs/0710.3110v2

Physics

Condensed Matter

Superconductivity

Accepted for publication in J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.77.053704

The effects of low carrier density and carrier compensation on mixed-state thermal transport are investigated beyond the quasiclassical approximation. It is shown that, contrary to the usual observations, the interplay of the two effects leads to an {\it increase} in the thermal conductivity immediately below the upper critical field $H_{c2}$. Our result can account for the anomalous behavior of the mixed-state thermal conductivity near $H_{c2}$ recently observed in URu$_2$Si$_2$.

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