Infrared Proe of the Electronic Structure and Charge Dynamics of Na0.7CoO2
Journal Article
·
· Physical Review Letters
- Chinese Academy of Sciences
- ORNL
We present measurements of the optical spectra on Na{sub 0.7}CoO{sub 2} single crystals. The optical conductivity shows two broad interband transition peaks at 1.6 eV and 3.1 eV, and a weak midinfrared peak at 0.4 eV. The intraband response of conducting carriers is different from that of a simple Drude metal. A peak at low but finite frequency is observed, which shifts to higher frequencies with increasing temperature, even though the dc resistivity is metallic. The origin of the interband transitions and the low-frequency charge dynamics have been discussed and compared with other experiments.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1003431
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 93; ISSN 1079-7114; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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