Nov, 2003
Comparative study of the electronic structure of MgB2 and ZrB2
PHYSICAL REVIEW B
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- Volume
- 68
- Number
- 17
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevB.68.174506
- Publisher
- AMER PHYSICAL SOC
X-ray photoemission spectroscopy is used to compare the electronic structures of MgB2 and ZrB2. The B 1s core levels in high-quality MgB2 and ZrB2 exhibit a single asymmetric peak typical of a metallic boride. The Mg 2p core level shows a single peak with negligible intensity in charge-transfer satellites and no correlation effects. The Mg 2p and B 1s core-level spectra exhibit a broad bulk plasmon feature centered at about 22 eV from the main peak, in good accord with calculations. The measured valence bands are consistent with band-structure calculations indicating a higher density of states (DOS) at E-F for MgB2 compared to ZrB2. The high T-c in MgB2 is due to p-derived DOS, while ZrB2 is dominated by d-derived states at E-F.
- Link information
- ID information
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- DOI : 10.1103/PhysRevB.68.174506
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000186971600074