Large anisotropy in the optical conductivity of YNi2B2C

Details Large anisotropy in the optical conductivity of YNi2B2C Large anisotropy in the optical conductivity of YNi2B2C

2002-07-05

arxiv.org/abs/cond-mat/0207147v1

Physics

Condensed Matter

Superconductivity

revtex4, 4 pages, 5 figures, to appear in PRB

Scientific paper

10.1103/PhysRevB.66.052512

The optical properties of YNi$_2$B$_2$C are studied by using the first-principles full-potential linearized augmented plane wave (FLAPW) method within the local density approximation. Anisotropic behavior is obtained in the optical conductivity, even though the electronic structure shows 3D character. A large peak in $\sigma_z$ is obtained at 2.4 eV. The anisotropic optical properties are analyzed in terms of interband transitions between energy levels and found that the Ni site plays an important role. The electronic energy loss spectroscopy (EELS) spectra are also calculated to help elucidate the anisotropic properties in this system.

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