Angular Dependence of the Nonlinear Transverse Magnetic Moment of YBa2Cu3O6.95 in the Meissner State

Anand Bhattacharya, Igor Zutic, Oriol T. Valls, A. M. Goldman, Ulrich Welp, Boyd Veal

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The angular dependence of the nonlinear transverse magnetic moment of untwinned high-quality single crystals of YBa2Cu3O6.95 has been studied at a temperature of 2.5 K using a low frequency ac technique. The absence of any signature at angular period 2π/4 is analyzed in light of the numerical predictions of such a signal for a pure dx2-y2 order parameter with line nodes. Implications of this null result for the existence of a nonzero gap at all angles on the Fermi surface are discussed.

Original languageEnglish (US)
Pages (from-to)3132-3135
Number of pages4
JournalPhysical review letters
Issue number15
StatePublished - 1999


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