Dynamic structure factor of a one-dimensional Peierls system

Scientific paper - Original scientific paper

• Author: Eduard Tutiš
• Author: Slaven Barišić
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The Newtonian dynamics of a one-dimensional system with a complex order parameter and an anharmonic potential energy of the Landau type is examined in a wide temperature range using numerical Monte Carlo–molecular dynamics simulations. Results are discussed with an emphasis on the incommensurate Peierls systems. Dispersive-mode behavior found previously in the quartic region near TMF can be followed to lower temperatures where the frequency of the phonon mode decreases and the damping increases. Below 0.4TMF the dynamic structure factor is characterized by the overdamped mode down to 0.3TMF, when the separation between the phase and the amplitude mode becomes effective. The relation between the different regimes in S(k,ω) and the pseudogap in the electronic spectrum is also briefly discussed.

• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review B (Condensed Matter)
• Numbering: vol. 43, no. 10, pp. 8431-8436
• p-ISSN: 0163-1829
• DOI: https://doi.org/10.1103/PhysRevB.43.8431
• URN:NBN: urn:nbn:hr:217:313199
• Publication: 1991
• Document URL: http://link.aps.org/doi/10.1103/PhysRevB.43.8431
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (1991) by the American Physical Society.
• Created on: 2019-10-01 20:06:47