Evolution of the electronic structure of a ferromagnetic metal: case of SrRuO3

Mahadevan, Priya ; Aryasetiawan, F. ; Janotti, A. ; Sasaki, T. (2009) Evolution of the electronic structure of a ferromagnetic metal: case of SrRuO3 Physical Review B: Condensed Matter and Materials Physics, 80 (3). Article ID 035106. ISSN 2469-9950

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Official URL: http://journals.aps.org/prb/abstract/10.1103/PhysR...

Related URL: http://dx.doi.org/10.1103/PhysRevB.80.035106

Abstract

Using density-functional calculations we have examined the evolution of the electronic structure of SrRuO3 films grown on SrTiO3 substrates as a function of film thickness. At the ultrathin limit of two monolayers (RuO2 -terminated surface) the films are found to be at the brink of a spin-state transition which drives the system to an antiferromagnetic and insulating state. Increasing the film thickness to four monolayers, one finds the surprising result that two entirely different solutions coexist. An antiferromagnetic insulating solution coexists with a metallic solution corresponding to an antiferromagnetic surface and a ferromagnetic bulk. The electronic structure found at the ultrathin limit persists for thicker films and an unusual result is predicted. Thicker films are found to be metallic as expected for the bulk but the magnetism does not directly evolve to the bulk ferromagnetic state. The surface remains antiferromagnetic while the bulk exhibits ferromagnetic ordering.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:102981
Deposited On:02 Feb 2018 03:55
Last Modified:02 Feb 2018 03:55

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