The effect of controllable optically-induced random anisotropic disorder on the magnetotransport in a two-dimensional electron system
AIP Conference Proceedings 772 (2005) 461-462
Abstract:
We have studied the effect of optically-induced random, anisotropic disorder on the magnetoresistance of a two-dimensional electron gas by exposing the sample to an anisotropic laser speckle pattern. Changes in the amplitude of the Shubnikov-de Haas oscillations can be explained in terms of easy and hard conductivity paths, parallel and perpendicular to the long axis of the oval speckle grains, respectively. © 2005 American Institute of Physics.Stick boundary conditions and rotational velocity auto-correlation functions for colloidal particles in a coarse-grained representation of the solvent
(2005)
Spin dynamics of the quasi two dimensional spin-1/2 quantum magnet Cs_2CuCl_4
(2005)
Elastic correlations in nucleosomal DNA structure.
Phys Rev Lett 94:23 (2005) 238102
Abstract:
The structure of DNA in the nucleosome core particle is studied using an elastic model that incorporates anisotropy in the bending energetics and twist-bend coupling. Using the experimentally determined structure of nucleosomal DNA [T. J. Richmond and C. A. Davey, Nature (London) 423, 145 (2003)], it is shown that elastic correlations exist between twist, roll, tilt, and stretching of DNA, as well as the distance between phosphate groups. The twist-bend coupling term is shown to be able to capture these correlations to a large extent, and a fit to the experimental data yields a new estimate of G = 25 nm for the value of the twist-bend coupling constant.Propulsion of a molecular machine by asymmetric distribution of reaction products.
Phys Rev Lett 94:22 (2005) 220801