Mott transition and suppression of orbital fluctuations in orthorhombic 3d1 perovskites -: art. no. 176403

被引：408

作者：

Pavarini, E

Biermann, S

Poteryaev, A

Lichtenstein, AI

Georges, A

Andersen, OK

机构：

[1] Univ Pavia, INFM, I-27100 Pavia, Italy

[2] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

[3] Ecole Polytech, Ctr Phys Theor, F-91128 Palaiseau, France

[4] Univ Nijmegen, NSRIM, NL-6525 ED Nijmegen, Netherlands

[5] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.176403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using t(2g) Wannier functions, a low-energy Hamiltonian is derived for orthorhombic 3d(1) 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.

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页码：176403 / 1

页数：4

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