Spin injection in the doped bad metal SrTiO3

Graziosi, P. et al. (2023) Spin injection in the doped bad metal SrTiO3. Physical Review Research, 5(3), 033096. (doi: 10.1103/PhysRevResearch.5.033096)

Abstract

In this paper, we demonstrate the capability to establish spin-polarized currents in doped SrTiO3 (STO). The results are based on the study of charge and spin transport in STO layers doped by the reversible electromigration of oxygen atoms in resistive-switching La0.7Sr0.3MnO3/STO/Co vertical stacks. The formation of oxygen vacancies inside STO results in a metallic conductivity at temperatures <200–250 K, above which a transitionto an insulating like behavior is detected. A detailed theoretical analysis shows that the behavior of the metallic phase in our samples corresponds to the well-known state of the thermodynamically doped STO featuring the so-called bad metal behavior. Thus, our findings introduce this class of unconventional materials as valuable candidates for innovative spintronic devices.

• Item Type: Articles
• Additional Information: Funding from the European Community's H2020 Programme under Grant Agreement No. INTERFAST (H2020-FET-OPEN-965046), and from the European Community's Seventh Framework Programme (FP7/2007-2013) under Grant Agreement No. IFOX NMP3-LA-2010-246102 and COST Action MOLSPIN 15128. P.G. acknowledges financial support from Italian MIUR through PRIN project Project QCNaMos - 2015HYFSRT_005.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: MacLaren, Professor Donald and O'Shea, Miss Kerry
• Authors: Graziosi, P., Bergenti, I., Vistoli, L., Galassi, F., Calbucci, M., Riminucci, A., Borgatti, F., MacLaren, D. A., O'Shea, K., Vinai, G., Torelli, P., Panaccione, G., Kabanov, V., and Dediu, V. A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review Research
• Publisher: American Physical Society
• ISSN: 2643-1564
• ISSN (Online): 2643-1564
• Published Online: 10 August 2023
• Copyright Holders: Copyright © the author(s) 2023
• First Published: First published in Physical Review Research 5(3):033096
• Publisher Policy: Reproduced under a Creative Commons license