Physics – Condensed Matter
Scientific paper
1994-06-08
Phys.Rev. E50 (1994) 4418-4426
Physics
Condensed Matter
20 pages, uuencoded, compressed tar file using harvmac(b) and epsf, 11 figures included, Saclay preprint T94/073
Scientific paper
10.1103/PhysRevE.50.4418
We study the problem of folding of the regular triangular lattice in the presence of bending rigidity K and magnetic field h (conjugate to the local normal vectors to the triangles). A numerical study of the transfer matrix of the problem shows the existence of three first order transition lines in the (K,h) plane separating three phases: a folded phase, a phase frozen in the completely flat configuration (with all normal vectors pointing up) and its mirror image (all normal vectors pointing down). At zero magnetic field, a first order folding transition is found at a positive value K_c=0.11(1) of the bending rigidity, corresponding to a triple point in the phase diagram.
Francesco Philippe Di
Guitter Emmanuel
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