Low-energy quasiparticles in cuprate superconductors: A quantitative analysis

May Chiao; R. W. Hill; Christian Lupien; Louis Taillefer; P. Lambert; R. Gagnon; P. Fournier

doi:10.1103/PhysRevB.62.3554

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Low-energy quasiparticles in cuprate superconductors: A quantitative analysis

May Chiao, R. W. Hill, Christian Lupien, Louis Taillefer, P. Lambert, R. Gagnon, P. Fournier

DOI 10.1103/PhysRevB.62.3554 · Physical Review B

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Abstract

A residual linear term is observed in the thermal conductivity of optimally doped Bi2Sr2CaCu2O8 at very low temperatures whose magnitude is in excellent agreement with the value expected from Fermi-liquid theory and the d-wave energy spectrum measured by photoemission spectroscopy with no adjustable parameters. This solid basis allows us to make a quantitative analysis of thermodynamic properties at low temperature and establish that thermally excited quasiparticles are a significant, perhaps even the dominant, mechanism in suppressing the superfluid density in cuprate superconductors Bi2Sr2CaCu2O8 and YBa2Cu3O7.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	89	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6.9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93.6	Pressure not reported	unknown