Anisotropy in the electronic structure of V2 GeC investigated by soft x-ray emission spectroscopy and first-principles theory

22Citations
Citations of this article
12Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The anisotropy of the electronic structure of ternary nanolaminate {V2GeC} is investigated by bulk-sensitive soft x-ray emission spectroscopy. The measured polarization-dependent emission spectra of V L2,3, C K, Ge M1, and Ge M2,3 in {V2GeC} are compared with those from monocarbide {VC} and pure Ge. The experimental emission spectra are interpreted with calculated spectra using ab initio density-functional theory including dipole transition matrix elements. Different types of covalent chemical bond regions are revealed: V {3d-C} 2p bonding at −3.8 {eV}, Ge {4p-C} 2p bonding at −6 {eV}, and Ge {4p-C} 2s interaction mediated via the V 3d orbitals at −11 {eV} below the Fermi level. We find that the anisotropic effects are high for the 4p valence states and the shallow 3d core levels of Ge, while relatively small anisotropy is detected for the V 3d states. The macroscopic properties of the {V2GeC} nanolaminate result from the chemical bonds with the anisotropic pattern as shown in this work.

Cite

CITATION STYLE

APA

Magnuson, M., Wilhelmsson, O., Mattesini, M., Li, S., Ahuja, R., Eriksson, O., … Jansson, U. (2008). Anisotropy in the electronic structure of V2 GeC investigated by soft x-ray emission spectroscopy and first-principles theory. Physical Review B - Condensed Matter and Materials Physics, 78(3). https://doi.org/10.1103/PhysRevB.78.035117

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free