Magnetic field-dependence of the basal-plane superconducting anisotropy in YBa2Cu4O8 from small-angle neutron scattering measurements of the vortex lattice

Jonathan S. White, Charlotte J. Bowell, Alistair S. Cameron +9

We report a study of the basal-plane anisotropy of the superfluid density in underdoped YBa${}_2$Cu${}_4$O${}_8$ (Y124), showing the effects of both the CuO${}_2$ planes and the fu…