Site-selective 63Cu NMR study of the vortex cores of Tl2Ba2CuO6+δ

We report site-selective 63Cu NMR studies of the vortex core states of an overdoped Tl2Ba2CuO6+δ with Tc=85K. 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 YBa2Cu3O7-δ.