Abstract
We report a site-selective spin-lattice relaxation rate in the vortex state of underdoped We found that at the planar sites exhibits an unusual nonmonotonic NMR frequency dependence. In the region well outside the vortex core, cannot be simply explained by the density of states of the Doppler-shifted quasiparticles in the d-wave superconductor. Based on in the vortex core region, we establish strong evidence that the local density of states within the vortex core is strongly reduced.
- Received 12 April 2001
DOI:https://doi.org/10.1103/PhysRevB.65.060503
©2002 American Physical Society