Nuclear-magnetic-resonance evidence for charge inhomogeneity in stripe ordered La1.8-xEu0.2SrxCuO4 -: art. no. 017002

We report O-17 nuclear-magnetic-resonance (NMR) results in the stripe ordered La1.8-xEu0.2SrxCuO4 system. Below a temperature T(q)similar to 80 K, the local electric field gradient and the absolute intensity of the NMR signal of the planar O site exhibit a dramatic decrease. We interpret these results as microscopic evidence for a spatially inhomogeneous charge distribution, where the NMR signal from O sites in the domain walls of the spin density modulation are wiped out due to large hyperfine fields, and the remaining signal arises from the intervening Mott insulating regions.