Source:http://linkedlifedata.com/resource/pubmed/id/16384401
Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
24
|
| pubmed:dateCreated |
2005-12-30
|
| pubmed:abstractText |
We have studied the electronic structure of the spinel-type compound CuIr2S4 using x-ray photoemission spectroscopy (XPS). CuIr2S4 undergoes a metal-insulator transition (MIT) at approximately 226 K. In going from the metallic to insulating states, the valence-band photoemission spectrum shows a gap opening at the Fermi level and a rigid-band shift of approximately 0.15 eV. In addition, the Ir 4f core-level spectrum is dramatically changed by the MIT. The Ir 4f line shape of the insulating state can be decomposed into two contributions, consistent with the charge disproportionation of Ir3+:Ir4+=1:1. XPS measurements under laser irradiation indicate that the charge disproportionation of CuIr2S4 is very robust against photo-excitation in contrast to Cs2Au2Br6 which shows photo-induced valence transition.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
|
| pubmed:month |
Dec
|
| pubmed:issn |
0031-9007
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:day |
9
|
| pubmed:volume |
95
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
246401
|
| pubmed:year |
2005
|
| pubmed:articleTitle |
X-Ray photoemission study of CuIr2S4: Ir3+-Ir4+ charge ordering and the effect of light illumination.
|
| pubmed:affiliation |
Department of Physics, University of Tokyo, 5-1-5 Kashiwanoha, Chiba 277-8581, Japan.
|
| pubmed:publicationType |
Journal Article
|