Tensor magnetothermal resistance in YBa2Cu3O7-x via Andreev scattering of quasiparticles

F. Yu, M. B. Salamon, A. J. Leggett, W. C. Lee, D. M. Ginsberg

Research output: Contribution to journalArticlepeer-review


A magnetic field in the a-b plane of an untwinned single crystal of YBa2Cu3O7-x (Tc = 92 K) is found to induce field-dependent off-diagonal elements in the thermal conductivity tensor at 10 K. The principal axes of the field-dependent part of the tensor lie along equivalent (110) directions; a principal component is maximized when the field is along the corresponding principal axis. A model that considers Andreev reflection of thermally excited quasiparticles by vortex screening currents gives semiquantitative agreement with experiment only if the gap function has nodes in the vicinity of 〈110〉.

Original languageEnglish (US)
Pages (from-to)5136-5139
Number of pages4
JournalPhysical review letters
Issue number25
StatePublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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