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  Spin-Orbit Coupling in the Mott Insulator Ca2RuO4

Mizokawa, T., Tjeng, L. H., Sawatzky, G. A., Ghiringhelli, G., Tjernberg, O., Brookes, N. B., et al. (2001). Spin-Orbit Coupling in the Mott Insulator Ca2RuO4. Physical Review Letters, 87(7): 077202, pp. 1-4. doi:10.1103/PhysRevLett.87.077202.

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Mizokawa, T.1, Author
Tjeng, L. H.2, Author           
Sawatzky, G. A.1, Author
Ghiringhelli, G.1, Author
Tjernberg, O.1, Author
Brookes, N. B.1, Author
Fukazawa, H.1, Author
Nakatsuji, S.1, Author
Maeno, Y.1, Author
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1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: 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.

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 Dates: 2001-07-30
 Publication Status: Issued
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 87 (7) Sequence Number: 077202 Start / End Page: 1 - 4 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1