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arxiv: cond-mat/0103046 · v1 · submitted 2001-03-02 · ❄️ cond-mat.supr-con · cond-mat.str-el

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

Eric Li (1) , J. J. Li (2) , R. P. Sharma (1) , S. B. Ogale (1) , W. L. Cao(2) , Y. G. Zhao(1) , C. H. Lee(2) , T. Venkatesan(1
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2) ((1)Center for Superconductivity Research NSF MRSEC on Oxide Thin Films Surfaces Department of Physics University of Maryland at College Park (2)Department of Electrical Engineering University of Maryland at College Park.)
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classification ❄️ cond-mat.supr-con cond-mat.str-el
keywords dependencefemto-secondopticalsharpspectroscopytimeyba2cu3o7-deltaantiferromagnetic
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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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