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

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

2001-03-02

arxiv.org/abs/cond-mat/0103046v1

Physics

Condensed Matter

Superconductivity

12 pages, 3 figures

Scientific paper

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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