Size effect of soft phonon dispersion in nanosized ferroics
نویسندگان
چکیده
منابع مشابه
Phonon dispersion in graphite.
We measured the dispersion of the graphite optical phonons in the in-plane Brillouin zone by inelastic x-ray scattering. The longitudinal and transverse optical branches cross along the Gamma-K as well as the Gamma-M direction. The dispersion of the optical phonons was, in general, stronger than expected from the literature. At the K point the transverse optical mode has a minimum and is only a...
متن کاملPhonon Dispersion in Noble Metals
für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...
متن کاملPhonon dispersion in polyinosinic acid.
A study of the normal modes of vibration and their dispersion in polyinosinic acid [poly (I)] along the helix axis based on Urey-Bradley force field is reported. It leads to a better interpretation of Raman and FTIR spectra. A comparison of dispersion curves of poly (I) with poly (G) has been made. Characteristic features of dispersion curves, such as regions of high density-of-states, repulsio...
متن کامل4.5 Surface phonon dispersion
ARP Angle Resolved Photoemission DFT Density Functional Theory FT Frustrated Translation HATOF He Atoms Time of Flight HREELS High Resolution Electron Energy Loss Spectroscopy IRAS Infrared Reflection Absorption Spectroscopy L Longitudinally polarised mode LDA Local Density Approximation LDM Lattice Dynamical Model LEED Low Energy Electron Diffraction ML Monolayer NEXAFS Near Edge X-rays Absorp...
متن کاملPhonon dispersion and electron-phonon coupling in MgB2 and AlB2.
We present a first principles investigation of the lattice dynamics and electron-phonon coupling of the superconductor MgB2 and the isostructural AlB2 within the framework of density functional perturbation theory using a mixed-basis pseudopotential method. Complete phonon dispersion curves and Eliashberg functions alpha2F are calculated for both systems. The main differences are related to hig...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2019
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.99.115412