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

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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 languageEnglish (US)
Pages (from-to)99-103
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Issue number1
StatePublished - 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.


  • Nonlinear Meissner effect
  • Pairing state
  • YBCO

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