Physcial Properties of SuperconductorNo Access

THERMAL CONDUCTIVITY OF YBa₂Cu₃O₇: s-WAVE INTERPRETATION

DALE R. HARSHMAN

Physikon Research Corporation, P.O. Box 1014, Lynden, Washington 98264, USA

Department of Physics, Arizona State University, Tempe, Arizona 85287-1504, USA

Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA

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and

JOHN D. DOW

Department of Physics, Arizona State University, Tempe, Arizona 85287-1504, USA

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https://doi.org/10.1142/S0217979205028116Cited by:8 (Source: Crossref)

Abstract

Previous interpretations of the thermal conductivity data of YBa₂Cu₃O₇ in terms of d-wave superconductivity have created the impression that this experiment can only be successfully explained in terms of a d-wave model. Here we show that thermal conductivity data can be (better) explained in terms of s-wave hole-pairing, which also handles some outstanding problems with the d-wave interpretation, namely, muon spectra that are s-wave and specific heat data that exhibit a zero-field linear-T term. The basic notion is that a high-temperature superconductor such as YBa₂Cu₂O₇ contains both superconducting and non-superconducting bands. The main superconducting bands are associated with BaO, and the CuO₂ bands are non-superconducting.

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References

D. J. Scalapino, Phys. Rpts. 250, 1 (1995). Google Scholar
K. McElroyet al., Nature 422, 592 (2003). Crossref, Web of Science, ADS, Google Scholar
A. Damascelli, Z.-X. Shen and Z. Hussain, Rev. Mod. Phys. 75, 473 (2003). Crossref, Web of Science, ADS, Google Scholar
J. C. Campuzano, M. R. Norman and M. Randeria, Physics of Superconductors II, eds. K. H. Benneman and J. B. Ketterson (Springer, Berlin, 2004) pp. 167–273. Crossref, Google Scholar
D. R. Harshmanet al., Phys. Rev. B 36, 2386 (1987). Crossref, Web of Science, ADS, Google Scholar
D. R. Harshmanet al., Phys. Rev. B 39, 851 (1989). Crossref, Web of Science, ADS, Google Scholar
B. Pümpinet al., Physica C 162-164, 151 (1989). Crossref, Web of Science, ADS, Google Scholar
B. Pümpinet al., Phys. Rev. B 42, 8019 (1990). Crossref, Web of Science, ADS, Google Scholar
D. R. Harshmanet al., Phys. Rev. Lett. 67, 3152 (1991). Crossref, Web of Science, ADS, Google Scholar
J. E. Sonier, J. H. Brewer and R. F. Kiefl, Rev. Mod. Phys. 72, 769 (2000). Crossref, Web of Science, ADS, Google Scholar
D. R. Harshmanet al., Phys. Rev. B 69, 174505 (2004). Crossref, Web of Science, ADS, Google Scholar
A. Erb, "The impact of crystal growth, oxygenation and microstructure on the physics of the rare earth (123) superconductors", Thesis Habilitation, University of Geneva, April 1999. Phys. Rev. B 64, 174505 (2004) . Google Scholar
A. G. Sunet al., Phys. Rev. Lett. 72, 2267 (1994). Crossref, Web of Science, ADS, Google Scholar
Qiang Li, Y. N. Tsay, M. Suenaga, R. A. Klemm, G. D. Gu, and N. Koshizuka, Phys. Rev. Lett. 83, 4160 (1999); R. A. Klemm, Intl. J. Mod. Phys. B12, 2920 (1998), and references therein . Google Scholar
K. A. Müller (Phil. Mag. Lett. 82, 270 (2002); J. Supercond. 15, 319 (2002)) has suggested that the superconductivity is in the cuprate planes and is d-like at the surface but s-like in the bulk. Such a change of symmetry from d to s may be difficult to achieve in the third layer below the surface, which is rather bulk-like . Google Scholar
For a review of the data, see J. D. Dow and D. R. Harshman, J. Phys. Chem. Solids 63, 2309 (2002); Brazilian J. Phys. 33, 681 (2003) . Google Scholar
J. A. Hodgeset al., Phys. Rev. B 66, 020501 (2002). Crossref, Web of Science, Google Scholar
K. A. Moleret al., Phys. Rev. B 55, 3954 (1997). Crossref, Web of Science, ADS, Google Scholar
There are two other items regarding the work of Moler et al. which will require further investigation: (i) the αT2 term in zero magnetic field seems to be near zero (Table IV of Ref. [18]), which might negate its importance, and (ii) the TH1/2 field-dependence of the specific heat (as opposed to TH) looks like it may not be well-evidenced by the data of Figs. 7 and 8 of Ref. [18] . Google Scholar
L. Tailleferet al., Phys. Rev. Lett. 79, 483 (1997). Crossref, Web of Science, ADS, Google Scholar