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Theory of resistivity upturns in metallic cuprates

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [1]
  1. University of Florida, Gainesville, FL (United States)
  2. University of Copenhagen (Denmark)
+ Show Author Affiliations

We propose that the experimentally observed resistivity upturn of cuprates at low temperatures may be explained by properly accounting for the effects of disorder in a strongly correlated metallic host. Within a calculation of the dc conductivity using real-space diagonalization of a Hubbard model treated in an inhomogeneous unrestricted Hartree-Fock approximation, we find that correlations induce magnetic droplets around impurities, and give rise to additional magnetic scattering which causes the resistivity upturn. Here, a pseudogap in the density of states is shown to enhance both the disorder-induced magnetic state and the resistivity upturns.

Research Organization:
University of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-05ER46236
OSTI ID:
2484120
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 13 Vol. 80; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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75 CONDENSED MATTER PHYSICS
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