Spin and orbital occupation and phase transitions in V2O3
SCIE
SCOPUS
- Title
- Spin and orbital occupation and phase transitions in V2O3
- Authors
- Park, JH; Tjeng, LH; Tanaka, A; Allen, JW; Chen, CT; Metcalf, P; Honig, JM; de Groot, FMF; Sawatzky, GA
- Date Issued
- 2000-05-01
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- Polarization dependent x-ray-absorption measurements were performed on pure and Cr-doped V2O3 single crystals in the antiferromagnetic insulating, paramagnetic insulating, and metallic phases. The orbital occupation of the V 3d(2) ion is found to depend appreciably on the phase, but always with the S= 1 character, requiring an explanation which is beyond the elegant simplicity of the pure one-band Hubbard model or of models in which the a(1g) orbital is projected out by means of a simple dimerization. The results reveal the critical role of the spin and orbital dependence of the on-site 3d-3d Coulomb energy, and a mechanism is proposed to explain the closing or opening of the band gaps which are of much higher energy scale than the transition temperatures.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12048
- DOI
- 10.1103/PhysRevB.61.11506
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 61, no. 17, page. 11506 - 11509, 2000-05-01
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