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Phys Rev Lett. 2008 Jun 27;100(25):257003. Epub 2008 Jun 26.

Breakdown of universal transport in correlated d-wave superconductors.

Author information

  • 1Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark.

Abstract

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 droplets arising from enhanced antiferromagnetic correlations in the underdoped state, even as these same correlations protect the nodal density of states.

PMID:
18643695
DOI:
10.1103/PhysRevLett.100.257003
[PubMed]
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