Conductivity in Pseudogapped Superconductors: The Role of the Fermi Arcs

Details Conductivity in Pseudogapped Superconductors: The Role of the Fermi Arcs Conductivity in Pseudogapped Superconductors: The Role of the Fermi Arcs

2010-12-20

arxiv.org/abs/1012.4498v2

Phys. Rev. B 84, 140509(R) (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures; To be published in PRB: Rapid Communications (2011)

Scientific paper

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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