Spins in the Vortices of a High Temperature Superconductor

Details Spins in the Vortices of a High Temperature Superconductor Spins in the Vortices of a High Temperature Superconductor

2002-01-19

arxiv.org/abs/cond-mat/0201347v1

Science volume 291 page 1759 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1126/science.1056986

Neutron scattering is used to characterise the magnetism of the vortices for the optimally doped high-temperature superconductor La(2-x)Sr(x)CuO(4) (x=0.163) in an applied magnetic field. As temperature is reduced, low frequency spin fluctuations first disappear with the loss of vortex mobility, but then reappear. We find that the vortex state can be regarded as an inhomogeneous mixture of a superconducting spin fluid and a material containing a nearly ordered antiferromagnet. These experiments show that as for many other properties of cuprate superconductors, the important underlying microscopic forces are magnetic.

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