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Orbital Physics in Spinel Oxides

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If you have a question about this talk, please contact Michael Sutherland .

Orbital degeneracy in the d states of transition-metal oxides gives rise to various intriguing phenomena, including large magnetic-field effect. Such magnetic-field effect is caused by the strong coupling between orbital and spin degrees of freedom in transition metals, which arises either from the so-called Kugel-Khomskii interaction (interionic orbital-spin coupling) or from single-ion spin-orbit coupling. In my talk, I show several intriguing properties, for example, magnetic-field-induced structural phase transition, “colossal” magnetostriction arising from the magnetic-field-induced alignment of crystalline domains, and large magnetocapacitance, in spinel oxides (MnV2O4, FeV2O4, and Mn3O4), and discuss how these properties can be explained by such orbital-spin coupling.

This talk is part of the Quantum Matter Seminar series.

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Hybrid: Seminar room, SPRI & Zoom - email organiser for details Lecture Room 3A Hughes Hall, University of Cambridge, Wollaston Road, Cambridge, CB1 2EW

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