Breakdown of universal transport in correlated d-wave superconductors

Details Breakdown of universal transport in correlated d-wave superconductors Breakdown of universal transport in correlated d-wave superconductors

2007-11-14

arxiv.org/abs/0711.2294v2

Phys. Rev. Lett. 100, 257003 (2008)

Physics

Condensed Matter

Superconductivity

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.100.257003

The prediction and observation of low-temperature universal thermal conductivity in cuprates has served as a keystone of theoretical approaches to the superconducting state, but recent measurements on underdoped samples show strong violations of this apparently fundamental property of d-wave nodal quasiparticles. Here, we show that the breakdown of universality may be understood as the consequence of disorder-induced magnetic states in the presence of increasing antiferromagnetic correlations in the underdoped state, even as these same correlations protect the nodal low-energy density of states in agreement with recent scanning tunneling experiments.

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