Optical properties and electronic structure of alpha '-Na1-xCaxV2O5

Article

关键词: PEIERLS COMPOUND ALPHA'-NAV2O5;    NAV2O5;    CONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.62.16522

来源: SCIE

【 摘 要 】

The dielectric function of alpha'-Na1-xCaxV2O5 (0 less than or equal to x less than or equal to 20%) was measured for the a and b axes in the photon energy range 0.8-4.5 eV at room temperature. By varying the Ca concentration we control the relative abundancy of V4+ and V5+. We observe that the intensity of the main optical absorption peak at 1 eV is proportional to the number of V5+ ions. This rules out the interpretation as a V4+ d-d excitation, and it establishes that this is the on-rung bonding-antibonding transition.

【 授权许可】

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