Site-selective 63Cu NMR study of the vortex cores of [formula omitted

Abstract

We report site-selective 63Cu NMR studies of the vortex core states of an overdoped Tl 2 Ba 2 CuO 6 + δ with T c = 85 K . We observed a relatively high density of low-energy quasi-particle excitations at the vortex cores in a magnetic field of 7.4847 T along the c-axis, in contrast to YBa 2 Cu 3 O 7 - δ .