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

DOI: 10.1016/j.elspec.2013.10.003 DOI Help

Authors: V. B. Zabolotnyy (IFW-Dresden) , D. V. Evtushinsky (IFW-Dresden) , A. A. Kordyuk (IFW-Dresden) , T. K. Kim (Diamond Light Source) , E. Carleschi (University of Johannesburg) , B. P. Doyle (University of Johannesburg) , R. Fittipaldi (CNR - SPIN UOS Salerno) , M. Cuoco (CNR - SPIN UOS Salerno) , A. Vecchione (CNR - SPIN UOS Salerno) , S. V. Borisenko (CNR - SPIN UOS Salerno)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Electron Spectroscopy And Related Phenomena

State: Published (Approved)
Published: October 2013

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.

Journal Keywords: Comparative Evaluations; Density; Electronic Structure; Electrons; Emission Spectroscopy; Fermi Level; Langmuir Frequency; Photoemission; Quasi Particles; Renormalization; Specific Heat; Velocity; Arpes; Strontium Ruthenate; Electronic Band Structure

Subject Areas: Physics

Facility: BESSY 1 ARPES