In-Plane Optical Spectra of Optimally-Doped LSCO Single Crystals |
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| Authors: | Y Fudamoto S Tajima B Gorshunov M Dressel T Kakeshita K M Kojima S Uchida |
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| Affiliation: | (1) Superconductivity Research Laboratory, ISTEC, Koto-ku, Tokyo, 135-0062, Japan;(2) Physikalisches Institut, Universität Stuttgart, Stuttgart, D-70550, Germany;(3) General Physics Institute, Russian Academy of Sciences, Moscow, 117942, Russia;(4) Graduate School of Frontier Sciences, the University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan |
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| Abstract: | The in-plane optical spectra of an optimally doped La1.85Sr0.15CuO4 single crystal were investigated over a wide range of frequency 8–30000 cm–1, including a submillimeter wavelength region. While the in-plane conductivity shows a depression below 150 cm–1 for T<T
c, which can be the signature of a gap formation, the spectral weight transferred to superfluid condensate is found to amount only to 48% at most of the value estimated from a London penetration depth in muon spin rotation study, suggesting the kinetic energy-driven superconductivity in this system. |
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