1. E. Dagotto is in the Department of Physics and National High Magnetic Field Lab, Florida State University, Tallahassee, FL 32306, USA.
2. T. M. Rice is with AT&T Bell Laboratories, Murray Hill, NJ 07974, USA, and Theoretische Physik, Eidgenössische Technische Hochschule, 8093 Zürich, Switzerland.