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Sharp resonant multiplet in femto-second optical pair-breaking spectroscopy of YBa2Cu3O7-delta

Eric Li·J. J. Li·R. P. Sharma·S. B. Ogale·W. L. Cao·Y. G. Zhao·C. H. Lee·T. Venkatesan
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Abstract

Femto-second optical pair breaking spectroscopy is performed on optimally doped YBa2Cu3O7-delta near 1.5eV. Dramatic photon energy dependence with a sharp triplet fine structure is seen for the first time. The peak separations are attributable to the reported phonon and magnetic excitations in the system. The power dependence is non-linear with differing exponents for the three contributions. These results imply the presence of insulating antiferromagnetic domains in the superconducting state of YBCO over sub-picosecond time scale, and thereby favor an electronic phase separation picture.

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Eric Li, J. J. Li, R. P. Sharma, S. B. Ogale, W. L. Cao, Y. G. Zhao, C. H. Lee, T. Venkatesan. 2001-03-02. Sharp resonant multiplet in femto-second optical pair-breaking spectroscopy of YBa2Cu3O7-delta. https://arxiv.org/abs/cond-mat/0103046

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