Simple Model of Nonlinear Spin Waves in Graphene Structures
Journal: Discrete and Continuous Models and Applied Computational Science (Vol.26, No. 3)Publication Date: 2018-08-04
Authors : D Kulyabov; K Lovetskiy; Anh Le;
Page : 244-251
Keywords : graphene; solitons; kinks; breathers; nonlinear models;
Abstract
A series of theoretical and experimental works is known which investigated the magnetic properties of graphene structures. This is due, among other things, to the prospects of using graphene as a material for the needs of the future nanoelectronics and spintronics. In particular, it is known about the presence of ferromagnetic properties at temperatures up to 200 C and above in a single-layer graphene films that are free from impurities. Previously there was proposed a quantum field theoretical model describing the possible mechanism of ferromagnetism in graphene as a result of spontaneous breaking of spin symmetry of the surface density of valence electrons. The possible spatial configurations of the localized spin density were described. In this paper we investigate such spatially localized nonlinear spin configurations of the valence electron density on the graphene surface such as kinks, and their interactions, as well as quasibound metastable states of the interacting kinks and antikinks, that are breathers. The spectrum of such breathers is investigated. It is shown that under certain conditions, this spectrum has a discrete sector, which, in turn, allows us to speak about the possibility of coherent quantum generation of spin waves in graphene structures, which is important in terms of practical applications in nanoelectronics and spintronics.
Other Latest Articles
- Finite Element Method of High-Order Accuracy for Solving Two Dimensional Elliptic Boundary-Value Problems of Two and Three Identical Atoms in a Line
- The Increase of Negative Hydrogen Ions Production in ECR Source by use of the Additional Low-Temperature Emitters of Electrons
- Wave Processes Modeling in Two Coaxial Shells Filled with a Viscous Liquid and Surrounded by Elastic Medium
- Corruption: Development Mechanisms, Ways of Prevention (Experience of Computer Modeling with Application of Numerical Methods)
- The Solvability of the Inverse Problem for the Evolution Equation with a Superstable Semigroup
Last modified: 2020-08-31 19:25:59