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

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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
Externally published	Yes

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We thank Y. Maeno, J. Zhang, H. Ding, and E. W. Plummer for stimulating discussions and sharing unpublished data.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.).

Funders	Funder number
National Science Foundation	DMR-0338376
Directorate for Mathematical and Physical Sciences	0338376
Japan Society for the Promotion of Science

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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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