Abstract
We report that Bi doping drives from an antiferromagnetic insulator () to a metallic paramagnet () with a broad low maximum in . Neutron scattering reveals local low energy spin excitations () with a spectrum that is unaffected by heating to . We show that a continuous distribution of splittings of the non-Kramers ground-state doublet such as might result from various types of lattice strain can account for all the data.
- Received 4 October 2004
- Corrected 5 May 2005
DOI:https://doi.org/10.1103/PhysRevLett.94.177201
©2005 American Physical Society
Corrections
5 May 2005