Three-dimensional bulk band dispersion in polar BiTeI with giant Rashba-type spin splitting

M. Sakano, J. Miyawaki, A. Chainani, Y. Takata, T. Sonobe, T. Shimojima, M. Oura, S. Shin, M. S. Bahramy, R. Arita, N. Nagaosa, H. Murakawa, Y. Kaneko, Y. Tokura, K. Ishizaka

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

In layered polar semiconductor BiTeI, giant Rashba-type spin-split band dispersions show up due to the crystal structure asymmetry and the strong spin-orbit interaction. Here we investigate the three-dimensional (3D) bulk band structures of BiTeI using the bulk-sensitive hν-dependent soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES). The obtained band structure is shown to be well reproducible by the first-principles calculations, with huge spin splittings of ∼300 meV at the conduction-band minimum and valence-band maximum located in the k z=π/c plane. It provides direct experimental evidence of the 3D Rashba-type spin splitting in a bulk compound.

原文English
文章編號085204
期刊Physical Review B - Condensed Matter and Materials Physics
86
發行號8
DOIs
出版狀態Published - 2012 八月 16

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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