Journal
PHYSICAL REVIEW B
Volume 82, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.235103
Keywords
-
Funding
- Department of Energy [DE-FG02-98ER45680]
- DARPA through ARO [W911NF-08-1-0283]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DEAC02-98CH10886]
Ask authors/readers for more resources
The chromium-vanadium oxide system V1-xCrxO2 (0.1<0.2) displays both insulating character in the rutile phase and room-temperature ferromagnetism. A combination of x-ray photoemission spectroscopy, resonant inelastic x-ray scattering, and resonant x-ray emission spectroscopy of the V L-3,L-2, O K, and Cr L-3,L-2 edges was used to study the electronic structure near the Fermi level of V0.82Cr0.12O2. Our results show that the chromium enters as Cr3+ with the d(3) configuration, resulting in the formation of Cr3+-V5+ ion pairs, in contrast to the simple Cr4+ substitution expected from the end members VO2 and CrO2. The occupied Cr 3d orbital is located similar to 2 eV below the Fermi level. Comparison with the parent material VO2 reveals significant changes in the O 2p bandwidth and increased O 2p-V 3d hybridization in V0.82Cr0.12O2, which are attributed to the reduced atomic spacing upon doping. Two energy loss features due to d-d* transitions are observed at 0.95 and 1.75 eV in the V L-3-edge x-ray scattering spectra and are explained in terms of the splitting of the t(2g)-derived pi band.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available