Gap Structure of the Spin-Triplet Superconductor Sr2RuO 4 Determined from the Field-Orientation Dependence of the Specific Heat

K. Deguchi, Z. Q. Mao, H. Yaguchi, Y. Maeno

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Abstract

The inplane anisotropy in the superconducting (SC) gap of the spin-triplet superconductor Sr2RuO4 from the field-orientation dependence of the specific heat at low temperatures was analyzed. A magnetic field was aligned parallel to the RuO2 planes with high accuracy. Single crystals of the compound were grown by a floating-zone method in an infrared image furnace. The gap structure in the active band was determined and the multiband superconductivity was identified. The SC state of the compound had a band-dependent gap and the gap of its active SC band had strong inplane anisotropy with a minimum along the [100] direction.

Original languageEnglish (US)
Article number047002
Pages (from-to)470021-470024
Number of pages4
JournalPhysical Review Letters
Volume92
Issue number4
StatePublished - Jan 30 2004

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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