Elastic deformations in field-cooled vortex lattices inNbSe2

Elastic secondary deformations by vector field integration

We present an approach for elastic secondary deformations of shapes described as triangular meshes. The deformations are steered by the simulation of a low number of simple mass-spring sets. The result of this simulation is used to define time-dependent divergence-free vector fields whose numerical path line integration gives the new location of each vertex. This way the deformation is guarante...

Elastic moduli of vortex lattices within nonlocal London model.

Vortex lattice (VL) elastic response is analyzed within the nonlocal London model which holds for high-kappa clean superconductors. The squash modulus vanishes at the field H( square) where VL undergoes a square-to-rhombus transition. For H>H( square), where the square VL is stable, the rotation modulus turns zero at H = H(r), indicating VL instability to rotations. The shear modulus depends on...

Plasticity in Current-Driven Vortex Lattices

Spatial-spectral vortex solitons in quadratic lattices.

We predict the existence of spatial-spectral vortex solitons in one-dimensional periodic waveguide arrays with quadratic nonlinear response. In such vortices the energy flow forms a closed loop through the simultaneous effects of phase gradients at the fundamental frequency and second-harmonic fields and the parametric frequency conversion between the spectral components. The linear stability a...

Single vortex in a 2D optical lattices

We consider a single vortex in a system of bosons trapped in socalled strictly 2D optical lattices. The system is treated in term of the Slave Boson representation for hard-core bosons which is valid in both dilute and dense limit. This model predicts almost the same result as the Gross-Pitaevskii approach using the same optical lattice model in the dilute limit PACS number(s): 03.75.Fi, 05.30J...