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arXiv · 1012.4498

Conductivity in Pseudogapped Superconductors: The Role of the Fermi Arcs

Dan Wulin·Benjamin M. Fregoso·Hao Guo·Chih-Chun Chien·Kathryn Levin
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Abstract

We calculate the dc conductivity $\sigma$ in a pseudogapped high $T_c$ superconductor within a theory which is consistent with gauge invariance. Our results contain additional terms beyond those identified previously. Although it has been thought that lifetime effects dominate the $T$ dependence of transport, here we show (consistent with growing experimental support) that the temperature dependence of the effective carrier number $(n/m(T))_{\rm{eff}}$ plays a critical role and thereby leads to the contrasting behavior between over and under-doped regimes. The role of Fermi arcs is secondary.

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Dan Wulin, Benjamin M. Fregoso, Hao Guo, Chih-Chun Chien, Kathryn Levin. 2010-12-20. Conductivity in Pseudogapped Superconductors: The Role of the Fermi Arcs. https://doi.org/10.1103/physrevb.84.140509

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