Anisotropic electronic structure in quasi-one-dimensional K0.3MoO3: An angle-dependent x-ray absorption study

作者：Tsai, H M; Asokan, K; Pao, C W; Chiou, J W; Du, C H; Pong, W F^*; Tsai, M H; Jang, L Y

来源：Applied Physics Letters, 2007, 91(2): 022109.

DOI：10.1063/1.2756358

The electronic structure of quasi-one-dimensional (quasi-1D) blue bronze, K0.3MoO3, was investigated by angle-dependent x-ray absorption near-edge structure (XANES) spectroscopy at O and K K and Mo L-3 edges along the quasi-1D MoO6 octahedron-chain direction, i.e., the b axis, and the octahedron-in-plane direction, i.e., the d axis, well below its Peierls phase transition temperature (180 K). The O K-edge XANES spectra indicate that the angle dependence of O 2p-Mo 4d hybridization, especially those with the pi(*) character, is more significant along the b axis than along the d axis. Similar trend is also observed in the Mo L-3-edge XANES spectra. The K K-edge XANES spectra reveal anisotropic effect of hybridization of K 4p states with O 2p states on the MoO6 octahedron.

• 出版日期2007-7-9
• 单位中山大学