19 March 2015 Model for spin waves and lasing in monolayer graphene films
Author Affiliations +
Abstract
Basing on Dirac equation for interacting massless fermions, we propose a nonlinear model that describes a possible mechanism of ferromagnetism in graphene structures, resulting from electron-electron interaction and spontaneous breaking of spin symmetry of valence electrons. Qualitative predictions of the model are important for practical applications in spintronics. Localized kink-antikink patterns of valence electron spin density on the graphene surface are calculated, their interaction is described, and, finally, the formation of their quasi-bound metastable states (breathers) is investigated. The spectrum of breathers is calculated in both the analytical and the numerical form. Once created, the inverted population of the appropriate states may be used to generate quantum coherent nonlinear spin waves that can find practical applications in nanoelectronics and spintronics. Optical excitation and possible lasing transitions between the breather discrete states are discussed.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vladimir L. Derbov, Vladimir L. Derbov, Dmitry D Grachev, Dmitry D Grachev, Leonid A. Sevastyanov, Leonid A. Sevastyanov, Konstantin P. Lovetskiy, Konstantin P. Lovetskiy, Sergey I. Vinitsky, Sergey I. Vinitsky, Alexander A. Gusev, Alexander A. Gusev, } "Model for spin waves and lasing in monolayer graphene films", Proc. SPIE 9448, Saratov Fall Meeting 2014: Optical Technologies in Biophysics and Medicine XVI; Laser Physics and Photonics XVI; and Computational Biophysics, 94481W (19 March 2015); doi: 10.1117/12.2178360; https://doi.org/10.1117/12.2178360
PROCEEDINGS
14 PAGES


SHARE
RELATED CONTENT

Spin-orbit coupling in graphene structures
Proceedings of SPIE (October 09 2012)
Infrared of thin film graphene in a magnetic field and...
Proceedings of SPIE (October 03 2008)
Diffusion thermopower in suspended graphene
Proceedings of SPIE (October 15 2012)
Ferromagnetic GaMnAs for spintronic devices
Proceedings of SPIE (June 11 2003)

Back to Top