TY - JOUR
T1 - Superconducting energy gap in Bi2Sr2CaCu2O8 observed by high-resolution photoemission spectroscopy
AU - Yokoya, Takayoshi
AU - Takahashi, Takashi
AU - Fujiwara, Akihiko
AU - Koike, Yoji
N1 - Funding Information:
Acknowledgment - The authors thank T. Morikawa and T. Morimoto for their help in photoemission measurement. They also thank H. Katayama-Yoshida, H. Matsumoto, S. Sato, and Y. Saito for their useful suggestion and discussion. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture, Japan.
PY - 1993/8
Y1 - 1993/8
N2 - A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (Δ) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.
AB - A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (Δ) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.
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U2 - 10.1016/0038-1098(93)90595-E
DO - 10.1016/0038-1098(93)90595-E
M3 - Article
AN - SCOPUS:0027642652
SN - 0038-1098
VL - 87
SP - 553
EP - 556
JO - Solid State Communications
JF - Solid State Communications
IS - 6
ER -