is a new heavy-electron material that crystallizes in a quasi-2D structure that can be viewed as alternating layers of and stacked sequentially along the tetragonal axis. Application of hydrostatic pressure induces a first-order-like transition from an unconventional antiferromagnetic state to a superconducting state with .
- Received 22 November 1999
- Published in the issue dated 22 May 2000
© 2000 The American Physical Society