Open AccessObservation of Band Renormalization Effects in Hole-Doped High-T c
Author(s) -
T. Sato,
H. Matsui,
Toru Takahashi,
Hong Ding,
Hongbo Yang,
S.-C. Wang,
T. Fujii,
Takao Watanabe,
Azusa Matsuda,
Takahito Terashima,
Kazuo Kadowaki
Publication year - 2003
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.91.157003
Subject(s) - cuprate , physics , superconductivity , photoemission spectroscopy , renormalization , angle resolved photoemission spectroscopy , condensed matter physics , energy (signal processing) , electron , spectroscopy , electronic structure , nuclear magnetic resonance , quantum mechanics , x ray photoelectron spectroscopy
We report a systematic high-resolution angle-resolved photoemission spectroscopy on high-Tc superconductors Bi2Sr2Can-1CunO2n+4 (n=1–3) to study the origin of many-body interactions responsible for superconductivity. For n=2 and 3, a sudden change in the energy dispersion, so called “kink”, becomes pronounced on approaching (π,0) in the superconducting state, while a kink appears only around the nodal direction in the normal state. For n=1, the kink shows no significant temperature dependence even across Tc. This could suggest that the coupling of electrons with Q=(π,π) magnetic mode is dominant in the superconducting state for multilayered cuprates, while the interactions at the normal state and that of single-layered cuprates have a different origin
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