Pairing symmetry in Bi2Sr2Ca1Cu 2O8+x

C. W. Schneider, W. K. Neils, H. Bielefeldt, G. Hammerl, A. Schmehl, H. Raffy, Z. Z. Li, S. Oh, J. N. Eckstein, D. J. Van Harlingen, J. Mannhart

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Abstract

Although the pairing symmetry of the high-Tc superconductors is widely accepted to be dx2-y2, measurements in apparent contradiction with this picture have been reported in Bi2Sr2Ca 1Cu2O8+x and attributed to s-wave symmetry or complex mixtures of s-wave and d-wave. To clarify this issue, we have measured the transport properties of asymmetric 45° [100]/[110] Bi2Sr 2Ca1Cu2O8+x bicrystal Josephson junctions, a geometry sensitive to the pairing symmetry. All samples investigated show complicated but polarity-symmetric modulation of their critical currents with magnetic field, providing unambiguous, clear evidence for a pre-dominant dx2-y2 pairing symmetry at Bi2Sr 2Ca1Cu2O8+x interfaces.

Original languageEnglish (US)
Pages (from-to)489-495
Number of pages7
JournalEurophysics Letters
Volume64
Issue number4
DOIs
StatePublished - Nov 1 2003

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Schneider, C. W., Neils, W. K., Bielefeldt, H., Hammerl, G., Schmehl, A., Raffy, H., Li, Z. Z., Oh, S., Eckstein, J. N., Van Harlingen, D. J., & Mannhart, J. (2003). Pairing symmetry in Bi2Sr2Ca1Cu 2O8+x. Europhysics Letters, 64(4), 489-495. https://doi.org/10.1209/epl/i2003-00249-7