Phys. Rev. Lett. 82, 1550–1553 (1999)

Low-Temperature Specific Heat of YBa₂Cu₃O_7-δ, 0 ≤ δ ≤ 0.2: Evidence for d-Wave Pairing

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D. A. Wright, J. P. Emerson, B. F. Woodfield^*, J. E. Gordon^†, R. A. Fisher, and N. E. Phillips
Department of Chemistry, University of California and Lawrence Berkeley National Laboratory, Berkeley, California 94720

Received 23 March 1998; published in the issue dated 15 February 1999

The dependence of the specific heat of YBa₂Cu₃O_7-δ on temperature (T) and magnetic field (H) shows a number of features predicted for d-wave pairing: a T² term for H = 0 and an H^1/2T term for H≠0 and low T, with a crossover to a stronger T dependence at higher T. For all H and T, these results are consistent with a recently proposed scaling relation. Values of the parameters derived from experimental data agree with theoretical predictions.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.82.1550

DOI:

10.1103/PhysRevLett.82.1550

PACS:

74.25.Bt, 74.72.Bk

^*Present address: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602.

^†Permanent address: Department of Physics, Amherst College, Amherst, MA 01002.

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Phys. Rev. Lett. 82, 1550–1553 (1999)

Low-Temperature Specific Heat of YBa2Cu3O7-δ, 0 ≤ δ ≤ 0.2: Evidence for d-Wave Pairing

Low-Temperature Specific Heat of YBa₂Cu₃O_7-δ, 0 ≤ δ ≤ 0.2: Evidence for d-Wave Pairing