Elastic contribution to interaction of vortices in uniaxial superconductors

Abstract

The stress caused by vortices in tetragonal superconductors contributes to the intervortex interaction which depends on vortex orientation within the crystal, on elastic moduli, and is attractive within certain angular regions even in fields along the $c$ crystal axis. For sufficiently strong stress dependence of the critical temperature, this contribution may result in distortions of the hexagonal vortex lattice for $\mathbf{H}||\mathbf{c}$. In small fields it leads to formation of a square vortex lattice with a fixed $H$ independent spacing. This should be seen in the magnetization $M(H)$ as a discontinuous jump of magnetization at the transition from the Meissner to mixed states.

5 pages, 2 figures

References in corpus (4)

• Vortex phase diagram of Ba(Fe0.93Co0.07)2As2 single crystals
• Hydrostatic-pressure tuning of magnetic, nonmagnetic and superconducting states in annealed Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
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Cited by in corpus (4)

• Disordered hyperuniform vortex matter with rhombic distortions in FeSe at low fields
• Strain-induced inter-vortex interaction and vortex lattices in tetragonal superconductors
• Magneto-elastic coupling model of deformable anisotropic superconductors
• Elastic fields in superconductors caused by moving vortices