Superconducting coherence peak in the electronic excitations of a single layer cuprate superconductor Bi₂ Sr_{1.6} La_{0.4} Cu O_{6+δ}

J. Wei , Y. Zhang , H. W. Ou , B. P. Xie , D. W. Shen , J. F. Zhao , L. X. Yang , M. Arita

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K. Shimada H. Namatame M. Taniguchi Y. Yoshida H. Eisaki D. L. Feng

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords layersinglecoherencecupratedeltaexcitationshighobserved

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Angle resolved photoemission spectroscopy study is reported on a high quality optimally doped Bi2Sr1.6La0.4CuO6+delta high Tc superconductor. In the antinodal region with maximal d-wave gap, the symbolic superconducting coherence peak, which has been widely observed in multi-CuO2-layer cuprate superconductors, is unambiguously observed in a single layer system. The associated peak-dip separation is just about 19 meV, which is much smaller than its counterparts in multi-layered compounds, but correlates with the energy scales of spin excitations in single layer cuprates.

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Superconducting coherence peak in the electronic excitations of a single layer cuprate superconductor Bi₂ Sr_{1.6} La_{0.4} Cu O_{6+δ}

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