Anisotropic and Heterogeneous Polymerized Membranes

Details Anisotropic and Heterogeneous Polymerized Membranes Anisotropic and Heterogeneous Polymerized Membranes

2003-12-22

arxiv.org/abs/cond-mat/0312567v1

Physics

Condensed Matter

Soft Condensed Matter

48 pgs, 16 eps figures; To appear in the 2nd Edition of the "Statistical Mechanics of Membranes and Surfaces", edited by D. R.

Scientific paper

In these lectures I discuss long-scale properties of fluctuating polymerized membranes in the presence of network anisotropy and random heterogeneities. Amazingly, even infinitesimal amount of these seemingly innocuous but physically important ingredients in the membrane's internal structure leads to a wealth of striking qualitatively new phenomena. Anisotropy leads to a ``tubule'' phase that is intermediate in its properties and location on the phase diagram between previously discussed ``crumpled'' and ``flat'' phases. At low temperature, network heterogeneity generates conformationally glassy phases, with membrane normals exhibiting glass order analogous to spin-glasses. The common thread to these distinct membrane phases is that they exhibit universal anomalous elasticity, (singularly length-scale dependent elastic moduli, universal Poisson ratio, etc.), driven by thermal fluctuations and/or disorder and controlled by a nontrivial low-temperature fixed point.

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