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Spin-orbit coupling in the Mott insulator Ca2RuO4
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2001 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 8707, no 7Article in journal (Refereed) Published
Abstract [en]

O 1s x-ray absorption study of the Mott insulator Ca2RuO4 shows that the orbital population of the 4d t(2g) band dramatically changes with temperature. In addition, spin-resolved circularly polarized photoemission study of Ca2RuO4 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 RuO6 octahedra causes the interesting changeover of the spin and orbital anisotropy as a function of temperature.

Place, publisher, year, edition, pages
2001. Vol. 8707, no 7
Keyword [en]
electronic-structure, layered perovskite, sr2ruo4, superconductivity, transition, states, ca2-xsrxruo4, triplet
URN: urn:nbn:se:kth:diva-20874DOI: 10.1103/PhysRevLett.87.077202ISI: 000170478300040OAI: diva2:339571
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Tjernberg, Oscar
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Microelectronics and Information Technology, IMIT
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