Electron-lattice coupling, orbital stability, and the phase diagram of Ca2-xSrxRuO4

Satoshi Okamoto; Andrew J. Millis

doi:10.1103/PhysRevB.70.195120

Electron-lattice coupling, orbital stability, and the phase diagram of Ca_2-xSr_xRuO₄

Satoshi Okamoto, Andrew J. Millis

Materials Theory

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32 Scopus citations

Abstract

Hartree-Fock calculations are presented of a theoretical model describing the (Sr,Ca)₂RuO₄ family of compounds. Both commensurate and incommensurate magnetic states are considered, along with orbital ordering and the effect of lattice distortions. The concept of interaction-driven orbital stability is introduced. A coherent description of the observed phase diagram is obtained involving relatively weak correlations and an insulating state stabilized by lattice distortions.

Original language	English
Article number	195120
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.70.195120
State	Published - Nov 2004

Funding

We thank Y. Maeno, J. Zhang, H. Ding, and E. W. Plummer for stimulating discussions and sharing unpublished data. This research was supported by NSF DMR-0338376 (A.J.M.) and JSPS (S.O.).

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10.1103/PhysRevB.70.195120

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Electron-lattice coupling, orbital stability, and the phase diagram of Ca_2-xSr_xRuO₄

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