Avoided critical behavior in a uniformly frustrated system |
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| Institution: | 1. Department of Physics, University of California, Berkeley, Berkeley, CA 94720, USA;2. Naval Research Laboratory, Washington D.C., 20375, USA;3. Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA 94720, USA |
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| Abstract: | We study the effects of weak long-ranged antiferromagnetic interactions of strength Q on a spin model with predominant short-ranged ferromagnetic interactions. In three dimensions, this model exhibits an avoided critical point in the sense that the critical temperature Tc(Q = 0) is strictly greater than limQ→0Tc(Q). The behavior of this system at temperatures less than Tc(Q = 0) is controlled by the proximity to the avoided critical point. We also quantize the model in a novel way to study the interplay between charge-density wave and superconducting order. |
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