corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 92 » Issue 17
< Previous Article | Next Article >

Phys. Rev. Lett. 92, 176403 (2004) [4 pages]

Mott Transition and Suppression of Orbital Fluctuations in Orthorhombic 3d1 Perovskites

Download: PDF (828 kB) Buy this article Export: BibTeX or EndNote (RIS)

E. Pavarini1, S. Biermann2, A. Poteryaev3, A. I. Lichtenstein3, A. Georges2, and O. K. Andersen4
1INFM and Dipartimento di Fisica “A. Volta,” Università di Pavia, Via Bassi 6, I-27100 Pavia, Italy
2Centre de Physique Théorique, Ecole Polytechnique, 91128 Palaiseau Cedex, France
3NSRIM, University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands
4Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

Received 4 September 2003; published 30 April 2004

Using t2g Wannier functions, a low-energy Hamiltonian is derived for orthorhombic 3d1 transition-metal oxides. Electronic correlations are treated with a new implementation of dynamical mean-field theory for noncubic systems. Good agreement with photoemission data is obtained. The interplay of correlation effects and cation covalency (GdFeO3-type distortions) is found to suppress orbital fluctuations in LaTiO3 and even more in YTiO3, and to favor the transition to the insulating state.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.176403
DOI:
10.1103/PhysRevLett.92.176403
PACS:
71.30.+h, 71.15.Ap, 71.27.+a
 
< Previous Article | Next Article >