Věnceslav Chumchal
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View article: Tensor-structured PCG for finite difference solver of domain patterns in ferroelectric material
Tensor-structured PCG for finite difference solver of domain patterns in ferroelectric material Open
This paper presents a case study of application of the preconditioned method of conjugate gradients (CG) on a problem with operator resembling the structure of sum of Kronecker products. In particular, we are solving the Poisson's equation…
View article: Zig-zag charged domain walls in ferroelectric PbTiO$_3$
Zig-zag charged domain walls in ferroelectric PbTiO$_3$ Open
We report a theoretical investigation of a charged 180$^\circ$ domain wall in ferroelectric PbTiO$_3$, compensated by randomly distributed immobile charge defects. For this we utilize atomistic shell-model simulations and continuous phase-…