Superexchange interaction in orbitally fluctuating RVO3

J. S. Zhou; J. B. Goodenough; J. Q. Yan; Y. Ren

doi:10.1103/PhysRevLett.99.156401

Superexchange interaction in orbitally fluctuating RVO3

J. S. Zhou, J. B. Goodenough, J. Q. Yan, Y. Ren

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53 Scopus citations

Abstract

Changes in pressure and magnetic field in the orbital and magnetic ordering temperatures of RVO3 perovskites are reported; they reveal a competition between two magnetic orbitally ordered phases that have opposite preferences for the e-orbital component in the localized T1g3 ground state of the V3+ ion. This competition is shown to be biased by the VO6/2 site distortion intrinsic to the orthorhombic structure. A remarkable enhancement of TN with pressure is found where the competition leads to enhanced orbital critical fluctuations.

Original language	English
Article number	156401
Journal	Physical Review Letters
Volume	99
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.99.156401
State	Published - Oct 8 2007
Externally published	Yes

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10.1103/PhysRevLett.99.156401

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abstract = "Changes in pressure and magnetic field in the orbital and magnetic ordering temperatures of RVO3 perovskites are reported; they reveal a competition between two magnetic orbitally ordered phases that have opposite preferences for the e-orbital component in the localized T1g3 ground state of the V3+ ion. This competition is shown to be biased by the VO6/2 site distortion intrinsic to the orthorhombic structure. A remarkable enhancement of TN with pressure is found where the competition leads to enhanced orbital critical fluctuations.",

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AB - Changes in pressure and magnetic field in the orbital and magnetic ordering temperatures of RVO3 perovskites are reported; they reveal a competition between two magnetic orbitally ordered phases that have opposite preferences for the e-orbital component in the localized T1g3 ground state of the V3+ ion. This competition is shown to be biased by the VO6/2 site distortion intrinsic to the orthorhombic structure. A remarkable enhancement of TN with pressure is found where the competition leads to enhanced orbital critical fluctuations.

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Superexchange interaction in orbitally fluctuating RVO3

Abstract

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