Investigation of the symmetry of the pairing state in YBa2Cu3O7-δ using the nonlinear transverse magnetic moment: Experimental results

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

Investigation of the symmetry of the pairing state in YBa₂Cu₃O_7-δ using the nonlinear transverse magnetic moment: Experimental results

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

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Measurements of the nonlinear transverse magnetic moment have been carried out on disk-shaped samples of YBCO, using an ac technique. Numerical calculations for a dx² - y² pairing state predict a fourfold modulation of this moment as a function of the angle between the applied magnetic and the crystalline axes for a magnetic field applied in the a-b plane of the sample. Our results imply a minimum nonzero gap at all points on the Fermi surface.

Original language	English (US)
Pages (from-to)	99-103
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	12
Issue number	1
State	Published - 1999

Bibliographical note

Funding Information:
We would like to acknowledge J. Buan, B. P. Stojkovic, R. Klemm, A. J. Leggett, and D. E. Grupp for helpful discussions. This work was supported in part by the AFOSR under grant F49620-96-0043. One of us (A.B.) would like to acknowledge the Foster Wheeler Fellowship of the Graduate School, University of Minnesota, for support.

Keywords

Nonlinear Meissner effect
Pairing state
YBCO

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AU - Valls, Oriol T.

AU - Welp, Ulrich

AU - Veal, Boyd

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