期刊
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
卷 191, 期 -, 页码 48-53出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.elspec.2013.10.003
关键词
ARPES; Strontium ruthenate; Electronic band structure; Tight-binding model; Surface photoemission
类别
资金
- DFG [ZA654/1-1]
- Faculty of Science at the University of Johannesburg
- FP7 [N.264098-MAMA]
We derive an effective quasiparticle tight-binding model which is able to describe with high accuracy the low-energy electronic structure of Sr2RuO4 obtained by means of low temperature angle resolved photoemission spectroscopy. Such an approach is applied to determine the momentum and orbital dependent effective masses and velocities of the electron quasiparticles close to the Fermi level. We demonstrate that the model can provide, among the various computable physical quantities, a very good agreement with the experimentally measured specific heat coefficient and compares well with the plasma frequency estimated from local density calculations. Its use is underlined as a realistic input in the analysis of the possible electronic mechanisms related to the superconducting state of Sr2RuO4. (C) 2013 Elsevier B.V. All rights reserved.
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