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Spin density wave induced disordering of the vortex lattice in superconducting La2-xSrxCuO4

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Chang J, White J S, Laver M, Bowel C J, Brown S P, Holmes A T, Maechler L, Strassle S, Gilardi R, Gerber S, Kurosawa T, Momono N, Oda M, Ido M, Lipscombe O J, Hayden S M, Dewhurst C D, Vavrin R, Gavilano J L, Kohlbrecher J, Forgan E M, Mesot J,
Project Interplay of Magnetism and Superconductivity in Unconventional Superconductors
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Original article (peer-reviewed)

Journal Phys. Rev. B
Volume (Issue) 85(13)
Page(s) 134520
Title of proceedings Phys. Rev. B

Abstract

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. 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.
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