The electronic structures of one-dimensional (1D) halogen-bridged mixed-metal compounds, [Ni1-xPdx(chxn)2X]X 2 (chxn= cyclohexanediamine; X=Cl,Br; 0≤x≤1), are investigated through optical and magnetic measurements. The results reveal that the system changes from charge-transfer (CT) insulator to Mott-Hubbard (MH) insulator at around x ∼0.3, and from MH insulator to Peierls insulator at x ∼0.9 with increasing x. From the analysis of optical conductivity spectra using the ID two-band extended Peierls-Hubbard model, electronic parameters such as Coulomb repulsion energy, pd hybridization, CT energy, and electron-lattice interaction are determined.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2004 Jul 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics