Abstract Details

Speaker	Wei-Sheng Lee (Stanford University)
Full Author List	W.S. Lee (1,2), D.H. Lu (1,2), W.L. Yang (3), X.J. Zhou (3), K.M. Shen (1,2), T. Cuk (1,2), C.T. Lin (4), J.-i. Shimoyama (5), (none) (0), (none) (0)
Affiliations	1. Dept. of Physics, Stanford University, Stanford, CA, USa, 2. Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, CA, USA, 3. Advanced Light Source, LBNL, Berkeley, CA, USA, 4. Max-Planck Institute Festkorperforschung, Stuttgart, Germany, 5. Dept. of Applied Chemistry, University of Tokyo, Tokyo, Japan, 6. (none), 7. (none), 8. (none), 9. (none), 10. (none)
Category	Materials Science
Abstract	The band renormalizations of BSCCO triple-layered system are studied by angle resolved photoemission technique. We find that at 120°K, when the system is in the normal state, the real part of self-energy exhibits fine structures. This suggests that the electronic states are renormalized by multiple bosonic modes. By applying the Maximum Entropy Method, we find that the real part of the self energy can be well fitted by two modes with the energies around 35 and 70 meV. We argue that the 70 meV kink in the superconducting state (25°K) is actually caused by the 35 meV mode, because a ~40 meV superconducting gap is opened. The origin of this 35 meV mode and its connection to superconductivity will also be discussed.

31st Annual SSRL Users' Meeting