Three-dimensional band structure of highly metallic Na0.8WO 3 by angle-resolved photoemission spectroscopy

Satyabrata Raj, Anirban Chakraborty, Debraj Choudhury, Takafumi Sato, Takashi Takahashi, Priya Mahadevan, Jun Fujii, Ivana Vobornik, D. D. Sarma

研究成果: Article査読

4 被引用数 (Scopus)


Three-dimensional electronic structure of highly metallic sodium tungsten bronze, Na0.8WO3, is investigated by high-resolution angle-resolved photoemission spectroscopy. The experimentally determined valence-band structure along the momentum directions both parallel and perpendicular to the surface has been compared with the results of ab initio band-structure calculation. The angle-resolved photoemission spectroscopy spectra for different photon energies reveal that possibly the oxygen vacancies in the system are responsible for the evolution of density of states at the top of Γ point in experimental valence band. The band dispersion around Γ (X) point leading to an electronlike Fermi surface is well predicted by the band calculation. As we move from bulk-sensitive to more-surface-sensitive photon energy, we found emergence of Fermi surfaces at X (M) and M (R) points similar to the one at Γ (X) point, suggesting the reconstruction of surface due to rotation/deformation of WO6 octahedra.

ジャーナルPhysical Review B - Condensed Matter and Materials Physics
出版ステータスPublished - 2009 1月 5

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


「Three-dimensional band structure of highly metallic Na0.8WO 3 by angle-resolved photoemission spectroscopy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。