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Transfer of spectral weight and symmetry across the metal-insulator transition in VO(2)
Transfer of spectral weight and symmetry across the metal-insulator transition in VO(2)
- Source :
- Physical review letters. 97(11)
- Publication Year :
- 2006
-
Abstract
- We present a detailed study of the valence and conduction bands of VO2 across the metal-insulator transition using bulk-sensitive photoelectron and O K x-ray absorption spectroscopies. We observe a giant transfer of spectral weight with distinct features that require an explanation which goes beyond the Peierls transition model as well as the standard single-band Hubbard model. Analysis of the symmetry and energies of the bands reveals the decisive role of the V 3d orbital degrees of freedom. Comparison to recent realistic many body calculations shows that much of the k dependence of the self-energy correction can be cast within a dimer model.
- Subjects :
- Physics
Phase transition
Valence (chemistry)
Hubbard model
Condensed matter physics
Peierls transition
Dimer
General Physics and Astronomy
Electronic structure
chemistry.chemical_compound
chemistry
Condensed Matter::Strongly Correlated Electrons
Metal–insulator transition
Electronic band structure
Subjects
Details
- ISSN :
- 00319007
- Volume :
- 97
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.doi.dedup.....daba192713506a694e6edefe43a317fa