"Self-energy analysis of multiple-bosonic mode coupling in Sr2RuO4

Chul Kim: W.S. Kyung, S.R. Park, C.S. Leem, D.J. Song, Y.K. Kim, S.K. Choi, W.S. Jung, Y.Y. Koh, H.Y. Choi, Yoshiyuki Yoshida, R.G. Moore, Z.-X. Shen, C. Kim; Journal of Physics and Chemistry of Solids, 05/15/11.

Additional Authors: W.S. Kyung, S.R. Park, C.S. Leem, D.J. Song, Y.K. Kim, S.K. Choi, W.S. Jung, Y.Y. Koh, H.Y. Choi, Yoshiyuki Yoshida, R.G. Moore, Z.-X. Shen, C. Kim

Abstract:

We report angle-resolved photoemission spectroscopy studies on Sr2RuO4. We observe multiple-bosonic mode coupling in the alpha and beta band dispersions. To extract the self-energy from the data for which the usual fitting methods do not work well, we propose a scheme that exploits the relation between the spectral intensity and self-energy, termed as relative self-energy. The relative self-energy obtained in that way contains important features of the self-energy. We observe not only the features that can be obtained from the band dispersions but also additional features that were not seen.