Electronic structure of B 2pσ and pπ states in MgB2, AlB2, and ZrB2 single crystals

Jin Nakamura, Shin Ya Nasubida, Eiki Kabasawa, Hisashi Yamazaki, Nobuyoshi Yamada, Kazuhiko Kuroki, Masamitsu Watanabe, Tamio Oguchi, Sergey Lee, Ayako Yamamoto, Setsuko Tajima, Yuji Umeda, Shin Minakawa, Noriaki Kimura, Haruyoshi Aoki, Shigeki Otani, Shik Shin, Thomas A. Callcott, David L. Ederer, Jonathan D. DenlingerRupert C C Perera

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Abstract

The effect of electron correlation (EC) on the electronic structure in MgB2, AlB2, and ZrB2, is studied by examining the partial density of states (PDOS) of B 2pσ and pπ orbitals using the polarization dependence of x-ray emission and absorption spectra. The discrepancies between observed and calculated PDOS's cannot be attributed to EC effects. The present results suggest that the EC effect is less than the experimental error (∼0.2 eV), which indirectly supports a scenario that electron-phonon interaction plays an essential role in the occurrence of superconductivity.

Original languageEnglish
Article number064515
Pages (from-to)645151-645155
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number6
Publication statusPublished - 2003 Aug
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Nakamura, J., Nasubida, S. Y., Kabasawa, E., Yamazaki, H., Yamada, N., Kuroki, K., ... Perera, R. C. C. (2003). Electronic structure of B 2pσ and pπ states in MgB2, AlB2, and ZrB2 single crystals. Physical Review B - Condensed Matter and Materials Physics, 68(6), 645151-645155. [064515].