200 citations · 2.3k across the 54 of their papers we have counts for
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Moving discrete breathers?
S. Flach, K. Kladko
We give definitions for different types of moving spatially localized objects in discrete nonlinear lattices. We derive general analytical relations connecting frequency, velocity…
Incremental expansions for Hubbard-Peierls systems
Jiri Malek, Konstantin Kladko, Sergej Flach
The ground state energies of infinite half-filled Hubbard-Peierls chains are investigated combining incremental expansion with exact diagonalization of finite chain segments. The g…
Perturbation analysis of weakly discrete kinks
S. Flach, K. Kladko
We present a perturbation theory of kink solutions of discrete Klein-Gordon chains. The unperturbed solutions correspond to the kinks of the adjoint partial differential equation.…
Acoustic breathers in two-dimensional lattices
S. Flach, K. Kladko, S. Takeno
The existence of breathers (time-periodic and spatially localized lattice vibrations) is well established for i) systems without acoustic phonon branches and ii) systems with acous…
Interaction of discrete breathers with electrons in nonlinear lattices
S. Flach, K. Kladko
We study the effects of electron-lattice interaction in the presence of discrete breathers. The lattice is treated classically. We consider two different situations - i) the scatte…
Energy thresholds for discrete breathers in one-, two- and three-dimensional lattices
S. Flach, K. Kladko, R. S. MacKay
Discrete breathers are time-periodic, spatially localized solutions of equations of motion for classical degrees of freedom interacting on a lattice. They come in one-parameter fam…