Electronic structure of Ce2Rh3Al9

• Autorzy: Goraus, J. , Ślebarski, A. , Deniszczyk, J.
• Języki publikacji: EN

Abstrakty

EN

We have investigated the XPS spectra of Ce2Rh3Al9 compound and calculated DOS by using the FP-LAPW (Full Potential Linear Augmented Plane Wave) and TB-LMTO-ASA (Tight Binding Linear Muffin Tin Orbitals) methods. The overall agreement between the calculated and the measured XPS valence band spectra is good. Analysis of the 3d XPS (X-ray Photoemission) spectra, using the Gunnarson-Schonhammer theory, suggests a mixed valence behaviour of Ce. FP-LAPW calculations show a half-metallic behaviour of Ce2Rh3Al9, whereas from LMTO calculations results a semiconducting and nonmagnetic ground state. This result is, however, in contradiction to the resistivity (T) experimental observation, which has not shown an activated behaviour. We attribute a possible appearance of the semiconducting/halfmetallic gap for Ce2Rh3Al9 to an atomic disorder.

Słowa kluczowe

PL

silnie skorelowane stany elektronowe; izolatory Kondo; struktura elektronowa

EN

strongly correlated electron system; Kondo insulators

• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 3
• Strony: 563--568
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Goraus, J.

autor

Ślebarski, A.

autor

Deniszczyk, J.

• Institute of Physics, University of Silesia, ul. Bankowa 12, 40-007 Katowice,,

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