Author/Authors :
J. Dong ، نويسنده , , D. Wu، نويسنده , , J.L. Luo، نويسنده , , M.E. Li، نويسنده , , X.G. Luo a، نويسنده , , X.H. Chen، نويسنده , , S. R. Jin، نويسنده , , D. Mandrus، نويسنده , , N.L. Wang، نويسنده ,
Abstract :
We study the charge dynamics and electronic structure by optical spectroscopy technique. Here we focus on the following four issues: (1) the evolution of optical spectra with Na content; (2) the spectral features specific to different regions in the phase diagram; (3) the c -axis optical response for crystal at the A-type antiferromagnetic region; (4) the optical response of misfit-layered Bi2M2Co2OyBi2M2Co2Oy (M=BaM=Ba, Sr, Ca) and Ca3Co4OyCa3Co4Oy single crystals.
