Single-particle excitation gap in La2−xS
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Y.X. Xiao; T. Sato; K. Terashima; H. Matsui; T. Takahashi; M. Kofu; K. Hirota
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Article
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2007
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Elsevier Science
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English
⚖ 225 KB
We report angle-resolved photoemission spectroscopy on optimally doped high-T c superconductor La 1.85 Sr 0.15 CuO 4 (T c = 37 K) to elucidate the character of low-energy excitations in the superconducting state. We find a clear evidence for the emergence of a sharp superconducting quasiparticle pea