TY - JOUR
T1 - ARPES study on many-body interactions in high-Tc cuprates
T2 - Origin of kink in energy dispersion
AU - Takahashi, Takashi
N1 - Funding Information:
This work was collaborated by T. Sato, H. Matsui, K. Terashima, H. Ding, H.-B. Yang, S.-C. Wang, T. Fujii, T. Watanabe, A. Matsuda, T. Terashima, and K. Kadowaki. and is supported by grants from MEXT of Japan and US NSF DMR-0072205. The Synchrotron Radiation Center is supported by US NSF DMR-0084402.
PY - 2006/1
Y1 - 2006/1
N2 - We report a systematic high-resolution ARPES study on Bi2Sr 2Can-1CunO2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near EF located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above Tc. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.
AB - We report a systematic high-resolution ARPES study on Bi2Sr 2Can-1CunO2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near EF located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above Tc. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.
KW - C. Photoelectron spectroscopy
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U2 - 10.1016/j.jpcs.2005.10.101
DO - 10.1016/j.jpcs.2005.10.101
M3 - Article
AN - SCOPUS:33645017162
VL - 67
SP - 193
EP - 197
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 1-3
ER -