Electron Momentum Density in the Low-Dimensional Layered System ZrTe_3(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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The electron momentum densities of the layered transition metal trichalcogenide ZrTe_3 have been studied by high-resolution Compton profiles (CPs) along the a*, b*, and c* directions, together with the theoretical CPs calculated using the local-density approximation based full-potential linearized augmented plane wave method. A fairly good accord between theory and experiment is found with respect to the overall shapes of the CPs and the anisotropies in the CPs defined as differences between pairs of various CPs. The observed anisotropy between b* and c* directions is much smaller compared with the others, in agreement with the theoretical result. It is shown that the Fermi surface geometry plays an effective role to reproduce the anisotropies. The characteristics of the Fermi surfces and bonding conditions in the ZrTe_3 are examined, and insights of the features in the CPs are gained.
社団法人日本物理学会の論文
2007-06-15