TY - JOUR
T1 - Trigonal-to-tetragonal transition in stressed SrTiO3
T2 - A realization of the three-state potts model
AU - Aharony, Amnon
AU - Müller, K. A.
AU - Berlinger, W.
PY - 1977
Y1 - 1977
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=4243248965&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.38.33
DO - 10.1103/PhysRevLett.38.33
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AN - SCOPUS:4243248965
SN - 0031-9007
VL - 38
SP - 33
EP - 36
JO - Physical Review Letters
JF - Physical Review Letters
IS - 1
ER -