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

doi:10.1103/PhysRevLett.82.3132

Angular Dependence of the Nonlinear Transverse Magnetic Moment of YBa₂Cu₃O_6.95 in the Meissner State

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

Physics and Astronomy (Twin Cities)

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Abstract

The angular dependence of the nonlinear transverse magnetic moment of untwinned high-quality single crystals of YBa₂Cu₃O_6.95 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 d_x²-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 language	English (US)
Pages (from-to)	3132-3135
Number of pages	4
Journal	Physical review letters
Volume	82
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.82.3132
State	Published - 1999

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AU - Valls, Oriol T.

AU - Goldman, A. M.

AU - Welp, Ulrich

AU - Veal, Boyd

PY - 1999

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AB - 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.

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Angular Dependence of the Nonlinear Transverse Magnetic Moment of YBa₂Cu₃O_6.95 in the Meissner State

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