About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review Letters
Paper
Trigonal-to-tetragonal transition in stressed SrTiO3: A realization of the three-state potts model
Abstract
The trigonal-to-pseudotetragonal structural first-order transition in [111]-stressed SrTiO3 is shown to be a realization of the continuous three-state Potts model. The measured order-parameter discontinuity at the transition, Δ →, depends on the trigonal order parameter [111] M as |Δ →||M|δ*, with δ*=0.62±0.10 (mean-field theory predicts δ*=1). This agrees with renormalization-group predictions, and proves that the model has a first-order transition even in the fluctuation-dominated region. © 1977 The American Physical Society.