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An intrinsic peak-dip-hump and strong coupling effects in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$ ARPES data near $(π,0)$

A. D. Gromko·Y. -D. Chuang·A. V. Fedorov·Y. Aiura·Y. Yamaguchi·K. Oka·Yoichi Ando·D. S. Dessau
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Abstract

A well-known peak-dip-hump structure exists near $(π, 0)$ in superconducting state ARPES spectra of $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$ (Bi2212). Here we report results on optimal and overdoped Bi2212 samples indicating the traditional peak-dip-hump structure observed near $(π,0)$ is largely due to bilayer splitting. However a separate, much weaker peak-dip hump (PDH) structure distinct from bilayer splitting can be detected near $(π, 0)$. This new PDH structure is consistent with electronic coupling to the magnetic resonance mode in Bi2212. Both the dispersion and line shape signatures indicate strong coupling to this mode.

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A. D. Gromko, Y. -D. Chuang, A. V. Fedorov, Y. Aiura, Y. Yamaguchi, K. Oka, Yoichi Ando, D. S. Dessau. 2002-05-17. An intrinsic peak-dip-hump and strong coupling effects in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$ ARPES data near $(π,0)$. https://arxiv.org/abs/cond-mat/0205385

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