Abstract
We study the zeros of the partition function of a classical spin system and compute a region of the complex fugacity plane where they necessarily lie. We recover the Lee-Yang circle theorem as a special example; we also find that a spin system with finite-range interaction has no phase transition at high temperature.
- Received 7 December 1970
DOI:https://doi.org/10.1103/PhysRevLett.26.303
©1971 American Physical Society