Optical properties and electronic structure of α′-Na1-xCaxV2O5

被引：25

作者：

Presura, C

van der Marel, D

Dischner, M

Geibel, C

Kremer, RK

机构：

[1] Univ Groningen, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands

[2] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.62.16522

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

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页码：16522 / 16527

页数：6

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