Elasticity, Shape Fluctuations and Phase Transitions of Anisotropic Membranes
Dr. Leo Radzihovsky, Univ of Colorado
``Tethered surfaces'', which are two-dimensional generalizations of linear polymer chains, have been the focus of a number of theoretical investigations during the past ten years.[1] Unlike conventional polymers, which are always crumpled at any temperature, these objects at low temperatures undergo conformational transitions to flat and tubule phases characterized by long-range order in the normals and very large fluctuations perpendicular to the average membrane orientation. Focussing on the tubule phase[2], recently observed in large scale Monte Carlo simulations[3], I will discuss these novel phases and describe transitions between them.

[1] "Statistical Mechanics of Membranes and Surfaces", ed. by D.R. Nelson T. Piran, and S. Weinberg (World Scientific, Singapore, 1989).

[2] L. Radzihovsky and J. Toner, Phys. Rev. Lett. 75 , 4752 (1995) ; Phys. Rev. E 57 , 1832 (1998). reprints

[3] M. Bowick, M. Falcioni, G. Thorleifsson, Phys. Rev. Lett. 79 , 885 (1997).

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