Spin density wave induced disordering of the vortex lattice in superconducting La(2−x)Sr(x)CuO(4)

We use small-angle neutron scattering to study the superconducting vortex lattice in La2−xSrxCuO4 as a function of doping and magnetic field. We show that near optimally doping the vortex lattice coordination and the superconducting coherence length ξ are controlled by a Van Hove singularity crossing the Fermi level near the Brillouin zone boundary. The vortex lattice properties change dramatically as a spin-density-wave instability is approached upon underdoping. The Bragg glass paradigm provides a good description of this regime and suggests that spin-density-wave order acts as a source of disorder on the vortex lattice.


Published in:
Physical Review B, 85, 13, 134520
Year:
2012
ISSN:
1550-235X
Keywords:
Laboratories:




 Record created 2012-05-23, last modified 2018-03-17


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