Abstract
Phonon dispersion relations in a two-dimensional electron–lattice system described by a two-dimensional square-lattice version of Su–Shrieffer–Heeger's model and having a half-filled electronic band are numerically studied at non-zero temperatures. When lowering temperature from a region higher than the critical temperature of the Peierls transition, multi-mode phonon softening is confirmed; the softening modes have wave vectors parallel to the nesting vector Q=(π,π) including Q itself. Some preliminary results in the temperature region lower than the critical temperature are also reported.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.