Avoided Critical Behavior in O(n) Systems

Details Avoided Critical Behavior in O(n) Systems Avoided Critical Behavior in O(n) Systems

1998-08-31

arxiv.org/abs/cond-mat/9808349v3

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.83.472

Long-range frustrating interactions, even if their strength is infinitesimal, can give rise to a dramatic proliferations of ground or near-ground states. As a consequence, the ordering temperature can exhibit a discontinuous drop as a function of the frustration. A simple model of the doped Mott insulator, where the short-range tendency of the holes to phase separate competes with long-range Coulomb effects, exhibits this "avoided critical" behavior. This model may serve as a paradigm for many other systems.

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