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  Anomalous spin polarization and dualistic electronic nature of CrO2

Huang, D. J., Tjeng, L. H., Chen, J., Chang, C. F., Wu, W. P., Chung, S. C., et al. (2003). Anomalous spin polarization and dualistic electronic nature of CrO2. Physical Review B, 67(21): 214419, pp. 1-5. doi:10.1103/PhysRevB.67.214419.

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Huang, D. J.1, Autor
Tjeng, L. H.2, Autor           
Chen, J.1, Autor
Chang, C. F.1, Autor
Wu, W. P.1, Autor
Chung, S. C.1, Autor
Tanaka, A.1, Autor
Guo, G. Y.1, Autor
Lin, H.-J.1, Autor
Shyu, S. G.1, Autor
Wu, C. C.1, Autor
Chen, C. T.1, Autor
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Zusammenfassung: Spin-resolved O 1s x-ray absorption measurements on CrO2 reveal that the spin polarization of the states at the Fermi level approaches 100%, providing direct evidence of the half-metallic nature of CrO2. The measurements also show the existence of an atomiclike Cr 3d state not far away from the Fermi level with a spin polarization of only 50%, establishing its Mott-Hubbard character. We conclude that CrO2 has a dualistic electronic nature, in which the states at the Fermi level are bandlike, while those at higher energies are strongly localized of completely different origin and symmetry. The finding of an exceptionally large number of O 2p holes suggests their important role in preventing the strongly correlated CrO2 from being an insulator.

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 Datum: 2003-06-16
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000184011100048
DOI: 10.1103/PhysRevB.67.214419
 Art des Abschluß: -

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Titel: Physical Review B
  Andere : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 67 (21) Artikelnummer: 214419 Start- / Endseite: 1 - 5 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008