Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 369, Issue 1941, Pages 1626-1639Publisher
ROYAL SOC
DOI: 10.1098/rsta.2010.0196
Keywords
superconductors; cuprates; phase diagram; electrical resistivity
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Funding
- EPSRC (UK)
- Royal Society
- French ANR IceNET
- EuroMagNET
- EPSRC [EP/F038836/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F038836/1] Funding Source: researchfish
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From analysis of the in-plane resistivity rho(ab)(T) of La2-xSrxCuO4, we show that normal state transport in overdoped cuprates can be delineated into two regimes in which the electrical resistivity varies approximately linearly with temperature. In the low-temperature limit, the T-linear resistivity extends over a very wide doping range, in marked contrast to expectations from conventional quantum critical scenarios. The coefficient of this T-linear resistivity scales with the superconducting transition temperature T-c, implying that the interaction causing this anomalous scattering is also associated with the superconducting pairing mechanism. At high temperatures, the coefficient of the T-linear resistivity is essentially doping independent beyond a critical doping p(crit) = 0.19 at which the ratio of the two coefficients is maximal. Taking our cue from earlier thermodynamic and photoemission measurements, we conclude that the opening of the normal-state pseudogap at p(crit) is driven by the loss of coherence of anti-nodal quasi-particles at low temperatures.
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