Evolution of Spin-Orbital-Lattice Coupling in the RVO3 Perovskites

Peter Horsch, Andrzej M. Oleś, Louis Felix Feiner, and Giniyat Khaliullin
Phys. Rev. Lett. 100, 167205 – Published 23 April 2008

Abstract

We introduce a microscopic model which unravels the physical mechanisms responsible for the observed phase diagram of the RVO3 perovskites. It reveals a nontrivial interplay between superexchange, the orbital-lattice coupling due to the GdFeO3-like rotations of the VO6 octahedra, and orthorhombic lattice distortions. We find that the lattice strain affects the onset of the magnetic and orbital order by partial suppression of orbital fluctuations. The present approach also provides a natural explanation of the observed reduction of magnon energies from LaVO3 to YVO3.

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  • Received 4 December 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.167205

©2008 American Physical Society

Authors & Affiliations

Peter Horsch1, Andrzej M. Oleś1,2, Louis Felix Feiner3, and Giniyat Khaliullin1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 2Marian Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, PL-30059 Kraków, Poland
  • 3Philips Research Laboratories, High Tech Campus 4, NL-5656 AE Eindhoven, The Netherlands

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Issue

Vol. 100, Iss. 16 — 25 April 2008

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