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arXiv · 1208.6442

Effect of electron-phonon coupling in the ARPES spectra of the tri-layer cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$

S. Ideta·T. Yoshida·M. Hashimoto·A. Fujimori·H. Anzai·A. Ino·M. Arita·H. Namatame·M. Taniguchi·K. Takashima·K. M. Kojima·S. Uchida
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Abstract

Angle-resolved photoemission spectroscopy using tunable low energy photons allows us to study the quasi-particle (QP) dispersions of the inner and outer CuO2 planes (IP and OP) separately in the tri-layer cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$ (Bi2223). The kink energy of the OP band is $\sim$ 70 meV, as observed in various high-$T_c$ cuprates, while that of the IP band is as large as 100 meV in the superconducting (SC) state. This large kink energy is attributed to the $\sim$ 35 meV buckling mode plus the large ($\sim$ 60 meV) SC gap of IP. The IP band also shows a weak kink feature at 70 meV in the SC state. The latter feature can be explained either by the 70 meV half-breathing mode or by the $\sim$ 35 meV buckling-phonon mode plus the $\sim$ 40 meV SC gap of OP if interlayer scattering of QP is involved.

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S. Ideta, T. Yoshida, M. Hashimoto, A. Fujimori, H. Anzai, A. Ino, M. Arita, H. Namatame, M. Taniguchi, K. Takashima, K. M. Kojima, S. Uchida. 2012-08-31. Effect of electron-phonon coupling in the ARPES spectra of the tri-layer cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$. https://doi.org/10.1088/1742-6596%2F428%2F1%2F012039

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