Condensed Matter Theory

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Charge separation of dense two-dimensional electron-hole gases: mechanism for exciton ring pattern formation.

Phys Rev Lett 92:11 (2004) 117405

Authors:

R Rapaport, Gang Chen, D Snoke, Steven H Simon, Loren Pfeiffer, Ken West, Y Liu, S Denev

Abstract:

We report on new experiments and theory that unambiguously resolve the recent puzzling observation of large diameter exciton emission halos around a laser excitation spot in two dimensional systems. We find a novel separation of plasmas of opposite charge with emission from the sharp circular boundary between these two regions. This charge separation allows for cooling of initially hot optically generated carriers as they dwell in the charge reservoirs for very long times.
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Permeative flows in cholesteric liquid crystals

(2004)

Authors:

D Marenduzzo, E Orlandini, JM Yeomans
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Strings on type-IIB pp-wave backgrounds with interacting massive theories on the worldsheet

Journal of High Energy Physics Springer Nature 2004:03 (2004) 027

Authors:

Alin Tirziu, Paul Fendley
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Influence of solvent quality on polymer solutions: a Monte Carlo study of bulk and interfacial properties

(2004)

Authors:

CI Addison, AA Louis, J-P Hansen
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Lattice Boltzmann simulations of contact line motion. I. Liquid-gas systems

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 69:3 1 (2004)

Authors:

AJ Briant, AJ Wagner, JM Yeomans

Abstract:

The applicability of a mesoscale modeling approach to the problem of contact line motion in one and two phase fluids was investigated. The thermodynamics boundary conditions were implemented, which allows to fix the static contact angle in the simulations. It was found that the contact line was overcome by evaporation or condensation near the contact line which was driven by the curvature of the diffuse interface. An analytic approximation was also derived for the angular position of a sheared interface.
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