Hole dynamics in spin and orbital ordered vanadium perovskites

Sumio Ishihara

doi:10.1103/PhysRevLett.94.156408

Hole dynamics in spin and orbital ordered vanadium perovskites

Sumio Ishihara

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

A theory of doped perovskite vanadates with spin and orbital orders is presented. Mobile holes are strongly renormalized by spin excitations (magnons) in the spin G-type and orbital C-type (SG-OC) order, and orbital excitations (orbitons) in the spin C-type and orbital G-type (SC-OG) one. Hole dynamics in a staggered t_2g orbital array is distinguished from that in the antiferromagnetic order and the e_g orbital one. The fragile character of the (SG-OC) order in Y_1-xCa_xVO₃ is attributed to the orbiton softening induced by a reduction of the spin order parameter.

Original language	English
Article number	156408
Journal	Physical review letters
Volume	94
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.94.156408
Publication status	Published - 2005 Apr 22
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.94.156408

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AB - A theory of doped perovskite vanadates with spin and orbital orders is presented. Mobile holes are strongly renormalized by spin excitations (magnons) in the spin G-type and orbital C-type (SG-OC) order, and orbital excitations (orbitons) in the spin C-type and orbital G-type (SC-OG) one. Hole dynamics in a staggered t2g orbital array is distinguished from that in the antiferromagnetic order and the eg orbital one. The fragile character of the (SG-OC) order in Y1-xCaxVO3 is attributed to the orbiton softening induced by a reduction of the spin order parameter.

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Hole dynamics in spin and orbital ordered vanadium perovskites

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