Field-induced hexagonal to square transition of the vortex lattice in overdoped La{1.8}Sr{0.2}CuO{4}

Abstract

We report on a small angle neutron scattering study of the vortex lattice in overdoped La{2-x}Sr{x}CuO{4} (x=0.2) up to high magnetic fields (9.5 Tesla) applied perpendicular to the CuO2 planes. At low magnetic fields we observe a crossover from hexagonal to square coordination of the vortex lattice. This field-induced transition confirms the results obtained in slightly overdoped La{2-x}Sr{x}CuO{4} (x=0.17).

arXiv comment3 pages, 2 figures. to appear in Physica C (proceedings for the M2S-HTSC-VII Conference, May 25-30, Rio de Janeiro)

References in corpus (6)

• Field dependence of the vortex structure in d-wave and s-wave superconductors
• Direct evidence for an intrinsic square vortex lattice in the overdoped high-Tc superconductor La1.83Sr0.17CuO4+d
• Reentrant vortex lattice transformation in four-fold symmetric superconductors
• Hexagonal and Square Flux Line Lattices in CeCoIn5
• Novel vortex lattice transition in d-wave superconductors
• A small angle neutron scattering study of the vortex matter in La{2-x}Sr{x}CuO{4} (x=0.17)

Cited by in corpus (3)

• Spin density wave induced disordering of the vortex lattice in superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Square vortex lattice at anomalously low magnetic fields in electron-doped Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_4$
• Doping dependence of the vortex glass and sublimation transitions in the high-$T_c$ superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$ as determined from macroscopic measurements