FisMat2017 - Submission - View

Abstract's title: Electronic Band Structure and Spin-Orbit Coupling in IrO2
Submitting author: Ivana Vobornik
Affiliation: CNR-IOM
Affiliation Address: AREA Science Park - Basovizza 34149 Trieste Italy
Country: Italy
Oral presentation/Poster (Author's request): Oral presentation
Other authors and affiliations: P. K. Das (CNR-IOM, AREA Science Park, Basovizza, Trieste, 34149 Italy, International Centre for Theoretical Physics, Strada Costiera 11, 34100 Trieste, Italy), J. Fujii (CNR-IOM, AREA Science Park, Basovizza, Trieste, 34149 Italy), G. Rossi (CNR-IOM, AREA Science Park, Basovizza, Trieste, 34149 Italy, Dipartimento di Fisica, Universita degli Studi di Milano, Via Celoria 16, Milano, 20133 Italy), J. Slawinska (CNR-SPIN, Sede temporánea di Chieti, 66100 Chieti, Italy), D. Di Sante (Institut fur Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland Campus Sud, Wurzburg 97074, Germany), A. Regoutz (Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom), C. McGuinness (School of Physics, Trinity College Dublin, College Green, Dublin 2, Ireland), W.R. Branford (Blackett Laboratory, Department of Physics, Imperial College, Prince Consort Road, South Kensington, London SW7 2AZ, United Kingdom), S. Picozzi (CNR-SPIN, Sede temporánea di Chieti, 66100 Chieti, Italy), G. Panaccione (CNR-IOM, AREA Science Park, Basovizza, Trieste, 34149 Italy) and D.J. Payne (Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom)
Abstract

 

5d transition metal oxides exhibit a wide range of exotic properties including spin orbit assisted Mott insulator, spin Hall effect and spin liquid and hold therefore a huge potential for future spintronic applications. Spin orbit coupling (SOC) is the driving mechanism behind all such exotic properties and states. For this reason understanding the role of SOC is key to understanding a wide range of physical phenomena and guiding their potential applications in technology. We have investigated the electronic band structure of the prototype binary iridate IrO2 by high resolution angle resolved photoemission spectroscopy. Our data are compatible with avoided crossing at the high-symmetry, hexatruple point (HP) along the G- Z direction in the Brillouin zone (BZ). This finding is supported with our density functional theory (DFT) calculations, and consistent with the recently proposed Dirac nodal lines (DNLs) by Sun et al. [1].

[1] Y. Sun, Y. Zhang, C.-X. Liu, C. Felser, B. Yan, Dirac nodal lines and induced spin Hall effect in metallic rutile oxides. arXiv:1701.09089 [cond-mat.mtrl-sci] (2017)