Electronic and atomic structures of quasi-one-dimensional K0.3MoO3

Huang, C. H.; Jan, J. C.; Chiou, J. W.; Tsai, H. M.; Pao, C. W.; Du, C. H.; Pong, W. F.; Tsai, M.-H.; Tang, M. T.; Lee, J. J.; Lee, J. F.
April 2005
Applied Physics Letters;4/4/2005, Vol. 86 Issue 14, p141905
Academic Journal
The electronic and atomic structures of quasi-one-dimensional blue bronze K0.3MoO3 were investigated by polarization-dependent O K-edge x-ray absorption near-edge structure (XANES) and Mo K-edge extended x-ray absorption fine structure (EXAFS) measurements at various temperature and applied voltages. The O K-edge XANES spectra suggest that the number of unoccupied O 2p–Mo 4d hybridized states increases and decreases with temperature, respectively, below and above a critical temperature of 180 K. The along b-axis electric current measurements show a threshold applied voltage, beyond which the current increases rapidly. The Mo K-edge EXAFS measurements show that the Mo–O bond lengths are insensitive to the temperature even beyond 180 K.


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