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Figure 37
Phase diagram of the DIFFFOUR model as a function of the parameters A/D and B/D, which depend in a simple way on the values of the spring constants. P is the para-phase (un = 0). Rational values of the wavevector, with respect to the basis in reciprocal space, give superstructures. The hatched regions are incommensurate phases.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 70| Part 4| July 2014| Pages 617-651
doi:10.1107/S2052520614014917
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