Employing nematic liquid crystals in a homeotropic cell with a photosensitive wall, dissipative vortex pairs are selectively induced by external illumination and the interaction law is characterized for pairs of opposite topological charges. Contrary to the phenomenological fit with a force inversely proportional to the distance, the data provide evidence that nonlinear mobility effects must be taken into account. The observations lead to a reconciliation of experiments with theory. © IOP Publishing and Deutsche Physikalische Gesellschaft.
Characterization of the vortex-pair interaction law and nonlinear mobility effects / Barboza, R.; Sauma, T.; Bortolozzo, U.; Assanto, G.; Clerc, M. G.; Residori, S.. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - ELETTRONICO. - 15:1(2013), p. 013028. [10.1088/1367-2630/15/1/013028]
Characterization of the vortex-pair interaction law and nonlinear mobility effects
Barboza R.
;
2013-01-01
Abstract
Employing nematic liquid crystals in a homeotropic cell with a photosensitive wall, dissipative vortex pairs are selectively induced by external illumination and the interaction law is characterized for pairs of opposite topological charges. Contrary to the phenomenological fit with a force inversely proportional to the distance, the data provide evidence that nonlinear mobility effects must be taken into account. The observations lead to a reconciliation of experiments with theory. © IOP Publishing and Deutsche Physikalische Gesellschaft.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
