Spin-orbit coupling in the Mott insulator Ca(2)RuO(4).

Mizokawa, T; Tjeng, L H; Sawatzky, G A; Ghiringhelli, G; Tjernberg, O; Brookes, N B; Fukazawa, H; Nakatsuji, S; Maeno, Y

Mizokawa, T; Tjeng, L H; Sawatzky, G A; Ghiringhelli, G; Tjernberg, O; Brookes, N B; Fukazawa, H; Nakatsuji, S; Maeno, Y.

Afiliación

Mizokawa T; Department of Complexity Science and Engineering, University of Tokyo, Tokyo 113-0033, Japan.

Phys Rev Lett ; 87(7): 077202, 2001 Aug 13.

Article en En | MEDLINE | ID: mdl-11497913

RESUMEN

O 1s x-ray absorption study of the Mott insulator Ca(2)RuO(4) shows that the orbital population of the 4d t(2g) band dramatically changes with temperature. In addition, spin-resolved circularly polarized photoemission study of Ca(2)RuO(4) shows that a substantial orbital angular momentum is induced in the Ru 4d t(2g) band. Based on the experimental results and model Hartree-Fock calculations, we argue that the cooperation between the strong spin-orbit coupling in the Ru 4d t(2g) band and the small distortion of the RuO(6) octahedra causes the interesting changeover of the spin and orbital anisotropy as a function of temperature.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2001 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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