178 research outputs found
Strain Enhanced Superconductivity in Li-Doped Graphene
We present a new way to enhance the electron-phonon coupling constant and the
critical superconducting temperature of graphene, significantly beyond all
reported values. Using density functional theory, we explore the application
effects of the tensile biaxial strain on the lithium intercalated graphene.
Both effects together, the presence of adatom and the strain, trigger
enhancement of critical temperature, up to 300\%, compared to non-strained
lithium intercalated graphene.Comment: 6 pages, 6 figures, 1 tabl
Rogue waves in a two-component Manakov system with variable coefficients and an external potential
We construct rogue waves (RWs) in a coupled two-mode system with the
self-focusing nonlinearity of the Manakov type (equal SPM and XPM
coefficients), spatially modulated coefficients, and a specially designed
external potential. The system may be realized in nonlinear optics and
Bose-Einstein condensates. By means of a similarity transformation, we
establish a connection between solutions of the coupled Manakov system with
spatially-variable coefficients and the basic Manakov model with constant
coefficients. Exact solutions in the form of two-component Peregrine and
dromion waves are obtained. The RW dynamics is analyzed for different choices
of parameters in the underlying parameter space. Different classes of RW
solutions are categorized by means of a naturally introduced control parameter
which takes integer values.Comment: 9 pages, 5 figure
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