Mobile holes in frustrated quantum magnets and itinerant fermions on frustrated geometries

Abstract

As discussed in several chapters of this volume, frustration leads to unconventional (insulating) ground states. On the other hand, doped holes are known to have profound effects in Mott insulators. Therefore doped frustrated systems offer the prospect of novel phases with some of the most fascinating, challenging and exotic behavior. In addition, at commensurate electron fillings and in the presence of strong (screened) Coulomb repulsion, geometrical frustration can also manifests itself as an extensive degeneracy of the classical ground-state manifold providing profound similarities with the field of quantum frustrated magnetism.

Book chapter in "Highly Frustrated Magnetism", Lectures from SISSA International School (Trieste, Italy August 2007), edited by C. Lacroix and F. Mila (Springer Verlag, 2010)