Transport and the order parameter of superconducting UPt3

W. C. Wu, R. Joynt

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Abstract

We calculate the ultrasonic absorption and the thermal conductivity in the superconducting state of UPt3 as functions of temperature and direction of propagation and polarization. Two leading candidates for the superconducting order parameter are considered: the E1g and E2u representations. Both can fit the data except for the ultrasonic absorption in the A phase. To do that, it is necessary to suppose that the system has only a single domain, and that must be chosen as the most favorable one. However, the E2u theory requires fine-tuning of parameters to fit the low-temperature thermal conductivity. Thus, transport data favor the E1g theory. Measurements of the thermal conductivity as a function of pressure at low temperature could help to further distinguish the two theories.

Original languageEnglish
Article number104502
Pages (from-to)1045021-1045026
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number10
Publication statusPublished - 2002 Mar 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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