Abstract
Zn-substituted high-temperature superconductors have been probed by nuclear magnetic resonance (NMR), susceptibility, and thermopower measurements. With NMR we have been able to study the gap in the spin density of states using the real part of the spin susceptibility determined from the Knight shift as Zn is progressively substituted onto the plane copper site. Zn substitution results in a rapid decrease in with a negligible decrease in the spin-gap energy and an inhomogeneous filling in of the gap in spin density of states.
- Received 10 April 1995
DOI:https://doi.org/10.1103/PhysRevB.51.16503
©1995 American Physical Society