Electron-lattice coupling, orbital stability and the phase diagram of Ca$_{2-x}$Sr$_x$RuO$_4$

Andrew J. Millis (Department of Physics; Columbia University); Satoshi Okamoto

arxiv: cond-mat/0402267 · v2 · pith:ID5VBVQKnew · submitted 2004-02-10 · ❄️ cond-mat.str-el

Electron-lattice coupling, orbital stability and the phase diagram of Ca_(2-x)Sr_xRuO₄

Satoshi Okamoto , Andrew J. Millis (Department of Physics , Columbia University) This is my paper

classification ❄️ cond-mat.str-el

keywords orbitaldiagramphasealongcalculationscaruocoherentcommensurate

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Hartree-Fock calculations are presented of a theoretical model describing the Sr/CaRuO$_4$ family of compounds. Both commensurate and incommensurate magnetic states are considered, along with orbital ordering and the effect of lattice distortions. For reasonable parameter values, interactions disfavor orbital disproportionation. A coherent description of the observed phase diagram is obtained.

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Electron-lattice coupling, orbital stability and the phase diagram of Ca_(2-x)Sr_xRuO₄

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