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Search: WFRF:(Mudry C.) > (2008)

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1.
  • Shi, Ming, et al. (author)
  • Coherent d-wave superconducting gap in underdoped La2-xSrxCuO4 by angle-resolved photoemission spectroscopy
  • 2008
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 101:4, s. 047002-
  • Journal article (peer-reviewed)abstract
    • We present angle-resolved photoemission spectroscopy data on moderately underdoped La1.855Sr0.145CuO4 at temperatures below and above the superconducting transition temperature. Unlike previous studies of this material, we observe sharp spectral peaks along the entire underlying Fermi surface in the superconducting state. These peaks trace out an energy gap that follows a simple d-wave form, with a maximum superconducting gap of 14 meV. Our results are consistent with a single gap picture for the cuprates. Furthermore our data on the even more underdoped sample La1.895Sr0.105CuO4 also show sharp spectral peaks, even at the antinode, with a maximum superconducting gap of 26 meV.
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2.
  • Chang, Johan, et al. (author)
  • Anisotropic quasiparticle scattering rates in slightly underdoped to optimally doped high-temperature La2-xSrxCuO4 superconductors
  • 2008
  • In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 78:20, s. 205103-
  • Journal article (peer-reviewed)abstract
    • An angle-resolved photoemission study of the scattering rate in the superconducting phase of the high-temperature superconductor La2-xSrxCuO4 with x=0.145 and x=0.17, as a function of binding energy and momentum, is presented. We observe that the scattering rate scales linearly with binding energy up to the high-energy scale E-1 similar to 0.4 eV. The scattering rate is found to be strongly anisotropic, with a minimum along the (0,0)-(pi,pi) direction. A possible connection to a quantum-critical point is discussed.
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3.
  • Chang, J., et al. (author)
  • Electronic structure near the 1/8-anomaly in La-based cuprates
  • 2008
  • In: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 10
  • Journal article (peer-reviewed)abstract
    • We report an angle-resolved photoemission study of the electronic structure of the pseudogap state in La1.48Nd0.4Sr0.12CuO4 (T-c < 7 K). Two opposite dispersing Fermi arcs are the main result of this study. Several scenarios that can explain this observation are discussed.
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  • Result 1-3 of 3

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