Electron spectroscopy and the electronic structure of KNbO3: First principle calculations
Trepakov, V. A.
Mamedov, A. M.
Taylor & Francis Online
99 - 105
Item Usage Stats
MetadataShow full item record
The electronic structures of KNbO3were calculated within the density functional theory, and their evolution was analyzed as the crystal-field symmetry changes from cubic to rhombohedral via tetragonal phase. We carried out electron-energy loss spectroscopy experiments by using synchrotron radiation and compared the results with the theoretical spectra calculated within Density Functional Theory. The dominant role of the NbO6 octahedra in the formation of the energy spectra of KNbO3compound was demonstrated. The anomalous behavior of plasmons in ferroelectrics was exhibited by the function representing the characteristic energy loss in the region of phase transition. © 2014 Copyright Taylor & Francis Group, LLC.
KeywordsDensity functional theory
Electron energy loss
First principle calculations
Published Version (Please cite this version)http://dx.doi.org/10.1080/00150193.2014.889998
Showing items related by title, author, creator and subject.
Dynamical screening effects in hot-electron scattering from electron-hole plasma and LO-phonon modes in quantum wires Bennett, C. R.; Tanatar, Bilal; Constantinou, N. C. (Elsevier, 1996)We present a fully dynamical and finite temperature study of the hot-electron momentum relaxation rate and the power loss in a coupled system of electron-hole plasma and bulk LO-phonons in a quantum wire structure. ...
Imaging capability of pseudomorphic high electron mobility transistors, AlGaN/GaN, and Si micro-Hall probes for scanning Hall probe microscopy between 25 and 125 °c Akram, R.; Dede, M.; Oral, A. (American Vacuum Society, 2009)The authors present a comparative study on imaging capabilities of three different micro-Hall probe sensors fabricated from narrow and wide band gap semiconductors for scanning hall probe microscopy at variable temperatures. ...
Effective electron-electron interactions and magnetic phase transition in a two-dimensional electron liquid Asgari, R.; Esmailian, A.; Tanatar, Bilal (Elsevier B.V., 2007)We investigate the spin-dependent effective electron-electron interactions in a uniform system of two-dimensional electrons to understand the spontaneous magnetization expected to occur at very low density. For this purpose, ...