Physics – Condensed Matter – Materials Science
Scientific paper
2000-05-19
Physics
Condensed Matter
Materials Science
19 pages, 16 figures, REVTeX, to be published in Journal of Physics A: Mathematical and General
Scientific paper
10.1088/0305-4470/33/25/305
The basic Landau model for uniaxial systems of the II class is nonintegrable, and allows for various stable and metastable periodic configurations, beside that representing the uniform (or dimerized) ordering. In the present paper we complete the analysis of this model by performing the second order variational procedure, and formulating the combined Floquet-Bloch approach to the ensuing nonstandard linear eigenvalue problem. This approach enables an analytic derivation of some general conclusions on the stability of particular states, and on the nature of accompanied collective excitations. Furthermore, we calculate numerically the spectra of collective modes for all states participating in the phase diagram, and analyze critical properties of Goldstone modes at all second order and first order transitions between disordered, uniform and periodic states. In particular it is shown that the Goldstone mode softens as the underlying soliton lattice becomes more and more dilute.
Bjelis Aleksa
Dananic V.
Latkovic M.
No associations
LandOfFree
Collective modes in uniaxial incommensurate-commensurate systems with the real order parameter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Collective modes in uniaxial incommensurate-commensurate systems with the real order parameter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collective modes in uniaxial incommensurate-commensurate systems with the real order parameter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-617119