Universal heat conduction in YBa2Cu3O6.9

Louis Taillefer; Benoit Lussier; Robert Gagnon; Kamran Behnia; Hervé Aubin

doi:10.1103/PhysRevLett.79.483

Universal heat conduction in YBa₂Cu₃O_6.9

Louis Taillefer, Benoit Lussier, Robert Gagnon, Kamran Behnia, Hervé Aubin

Research output: Contribution to journal › Article › peer-review

Abstract

The thermal conductivity of YBa₂Cu₃O_6.9 was measured at low temperatures in untwinned single crystals with concentrations of Zn impurities from 0% to 3% of Cu. A linear term k₀/T = 0.19mWK^-2cm^-1 is clearly resolved as T → 0, and found to be virtually independent of Zn concentration. The existence of this residual normal fluid strongly validates the basic theory of transport in unconventional superconductors. Moreover, the observed universal behavior is in quantitative agreement with calculations for a gap function of d -wave symmetry.

Original language	English
Pages (from-to)	483-486
Number of pages	4
Journal	Physical Review Letters
Volume	79
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.79.483
Publication status	Published - 1 Jan 1997
Externally published	Yes

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title = "Universal heat conduction in YBa2Cu3O6.9",

abstract = "The thermal conductivity of YBa2Cu3O6.9 was measured at low temperatures in untwinned single crystals with concentrations of Zn impurities from 0\% to 3\% of Cu. A linear term k0/T = 0.19mWK-2cm-1 is clearly resolved as T → 0, and found to be virtually independent of Zn concentration. The existence of this residual normal fluid strongly validates the basic theory of transport in unconventional superconductors. Moreover, the observed universal behavior is in quantitative agreement with calculations for a gap function of d -wave symmetry.",

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AU - Taillefer, Louis

AU - Lussier, Benoit

AU - Gagnon, Robert

AU - Behnia, Kamran

AU - Aubin, Hervé

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The thermal conductivity of YBa2Cu3O6.9 was measured at low temperatures in untwinned single crystals with concentrations of Zn impurities from 0% to 3% of Cu. A linear term k0/T = 0.19mWK-2cm-1 is clearly resolved as T → 0, and found to be virtually independent of Zn concentration. The existence of this residual normal fluid strongly validates the basic theory of transport in unconventional superconductors. Moreover, the observed universal behavior is in quantitative agreement with calculations for a gap function of d -wave symmetry.

AB - The thermal conductivity of YBa2Cu3O6.9 was measured at low temperatures in untwinned single crystals with concentrations of Zn impurities from 0% to 3% of Cu. A linear term k0/T = 0.19mWK-2cm-1 is clearly resolved as T → 0, and found to be virtually independent of Zn concentration. The existence of this residual normal fluid strongly validates the basic theory of transport in unconventional superconductors. Moreover, the observed universal behavior is in quantitative agreement with calculations for a gap function of d -wave symmetry.

U2 - 10.1103/PhysRevLett.79.483

DO - 10.1103/PhysRevLett.79.483

M3 - Article

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SP - 483

EP - 486

JO - Physical Review Letters

JF - Physical Review Letters

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Universal heat conduction in YBa2Cu3O6.9

Abstract

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Universal heat conduction in YBa₂Cu₃O_6.9