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Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach (Articolo in rivista)

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Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach (Articolo in rivista) (literal)

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V.B. Zabolotnyya, D.V. Evtushinskya, A.A. Kordyuka, b, T.K. Kima, c, E. Carleschid, B.P. Doyled, R. Fittipaldi e, M. Cuoco e, A. Vecchione e, S.V. Borisenko a (2013)
Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach
in Journal of electron spectroscopy and related phenomena (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

V.B. Zabolotnyya, D.V. Evtushinskya, A.A. Kordyuka, b, T.K. Kima, c, E. Carleschid, B.P. Doyled, R. Fittipaldi e, M. Cuoco e, A. Vecchione e, S.V. Borisenko a (literal)

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a Institute for Solid State Research, IFW-Dresden, P.O. Box 270116, D-01171 Dresden, Germany b Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine c Diamond Light Source Ltd., Didcot, Oxfordshire OX11 0DE, United Kingdom d Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa e CNR-SPIN, and Dipartimento di Fisica \"E.R. Caianiello\", Università di Salerno, I-84084 Fisciano (Salerno), Italy (literal)

Titolo

Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach (literal)

Abstract

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. (literal)

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