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Angular Dependence of the Nonlinear Transverse Magnetic Moment of YBCO in the Meissner state

Anand Bhattacharya·Igor Zutic·Oriol T. Valls·Allen M. Goldman·Ulrich Welp·Boyd Veal
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Abstract

The angular dependence of the nonlinear transverse magnetic moment of untwinned high-quality single crystals of optimally doped YBCO have been studied at a temperature of 2.5K using a low frequency AC technique. The absence of any signature at angular period 2π/4is analyzed in light of the numerical predictions of such a signal for a pure d-wave order parameter with line nodes. Implications of this null result for the existence of a non-zero gap at all angles on the Fermi surface are discussed.

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Anand Bhattacharya, Igor Zutic, Oriol T. Valls, Allen M. Goldman, Ulrich Welp, Boyd Veal. 1998-12-14. Angular Dependence of the Nonlinear Transverse Magnetic Moment of YBCO in the Meissner state. https://doi.org/10.1103/physrevlett.82.3132

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