Chaudhuri, Debasish ; Sengupta, Surajit (2008) Anomalous structural and mechanical properties of solids confined in quasi-one-dimensional strips The Journal of Chemical Physics, 128 (19). 194702_1-194702_12. ISSN 0021-9606
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Official URL: http://jcp.aip.org/resource/1/jcpsa6/v128/i19/p194...
Related URL: http://dx.doi.org/10.1063/1.2918267
Abstract
We show using computer simulations and mean field theory that a system of particles in two dimensions, when laterally confined by a pair of parallel hard walls within a quasi-one-dimensional channel, possesses several anomalous structural and mechanical properties not observed in the bulk. Depending on the density ρ and the distance between the walls Ly, the system shows structural characteristics analogous to a weakly modulated liquid, a strongly modulated smectic, a triangular solid, or a buckled phase. At fixed ρ , a change in Ly leads to many re-entrant discontinuous transitions involving changes in the number of layers parallel to the confining walls depending crucially on the commensurability of interlayer spacing with Ly. The solid shows resistance to elongation but not to shear. When strained beyond the elastic limit, it fails undergoing plastic deformation but surprisingly, as the strain is reversed, the material completely recovers and returns to its original undeformed state. We obtain the phase diagram from mean field theory and finite size simulations and discuss the effect of fluctuations.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Institute of Physics. |
Keywords: | Buckling; Elastic Limit; Fluctuations; Phase Diagrams |
ID Code: | 56547 |
Deposited On: | 24 Aug 2011 11:10 |
Last Modified: | 18 May 2016 08:19 |
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