TY - JOUR
T1 - Many-body interactions in hole-doped high-Tc cuprates studied by high-resolution ARPES
AU - Sato, T.
AU - Terashima, K.
AU - Nakayama, K.
AU - Arakane, T.
AU - Matsui, H.
AU - Takahashi, T.
N1 - Funding Information:
We thank T. Yamamoto, K. Kadowaki, M. Kofu, K. Hirota, T. Nishizaki, Y. Takahashi, and N. Kobayashi for providing us high-quality single crystals. We also thank M. Kubota and K. Ono for their assistance in the ARPES experiment in Photon Factory. This work is supported by the JST-CREST and the MEXT of Japan. K.T. and H.M. thank JSPS for financial support.
PY - 2008/12
Y1 - 2008/12
N2 - We have performed high-resolution angle-resolved photoemission spectroscopy on hole-doped high-Tc cuprate superconductors (HTSCs) to study many-body interaction and the universality of low-energy excitation gap. In Bi2Sr2CaCu2O8 (Bi2212), we observed a kink in the dispersion in the off-nodal region in the superconducting state, which remarkably weakens on impurity substitution. We also find that the appearance of the kink in the off-nodal region is a common feature of Bi2212 and La1.85Sr0.15CuO4 (LSCO), while the energy scale is remarkably different between two compounds (70 and 20 meV). We discuss universality of the kink in dispersion in the hole-doped HTSCs in terms of the coupling of electrons with spin fluctuations.
AB - We have performed high-resolution angle-resolved photoemission spectroscopy on hole-doped high-Tc cuprate superconductors (HTSCs) to study many-body interaction and the universality of low-energy excitation gap. In Bi2Sr2CaCu2O8 (Bi2212), we observed a kink in the dispersion in the off-nodal region in the superconducting state, which remarkably weakens on impurity substitution. We also find that the appearance of the kink in the off-nodal region is a common feature of Bi2212 and La1.85Sr0.15CuO4 (LSCO), while the energy scale is remarkably different between two compounds (70 and 20 meV). We discuss universality of the kink in dispersion in the hole-doped HTSCs in terms of the coupling of electrons with spin fluctuations.
KW - C. Photoelectron spectroscopy
KW - D. Electronic structure
KW - D. Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=57049122775&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57049122775&partnerID=8YFLogxK
U2 - 10.1016/j.jpcs.2008.06.016
DO - 10.1016/j.jpcs.2008.06.016
M3 - Article
AN - SCOPUS:57049122775
SN - 0022-3697
VL - 69
SP - 2949
EP - 2955
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 12
ER -