Seminars

Contact :
Matthieu Labousse
matthieu.labousse (arobase) espci.psl.eu
Tel : +33 (0) 1 40 79 45 97

Joshua McGraw
joshua.mcgraw (arobase) espci.fr
Tel : +33 (0) 1 40 79 59 62

Map

Gulliver seminars take place on Mondays at 11:30 AM in the F304 room, and typically last one hour including questions. The seminars are in English, and the scientific topics are mainly those studied in the laboratory.



Gulliver Seminar : Thomas Machon (University of Bristol)

Lundi 27 juin 11:30-12:30 - Bibliothèque PCT - F3.04

Contact geometry in cholesterics and chiral materials

Chirality in materials, such as liquid crystals, often entails a high degree of frustration, leading to a rich array of morphological phenomena. Here I will discuss how methods from contact geometry and topology can be used to give a qualitative understanding of the behaviour of chiral materials. Using experiments on cylindrically confined lyotropic chromonic liquid crystals as a model system, I will show how contact topology-theoretic methods lead to a topological description of the various metastable minima in the energy landscape, as well as explaining the existence of novel chirally-protected solitons. I will further show how the same perspective can be used to understand the structural stability of highly-twisted Skyrmions in chiral ferromagnets, with applications to racetrack memory devices. Finally, I will present the results of transition path sampling calculations describing generic features of chiral morphological transitions in liquid crystalline systems.

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Seminars  (0)

General recommendations for the speakers

The audience is often heterogeneous - because of the wide range of scientific topics covered in the lab - so planning a talk for a broader audience would be preferred. The seminar is in English, and speakers are thus invited to prepare their slides in English.

The seminar starts at 11:30 AM. The speaker is asked to arrive in the lab at least 15 minutes in advance to set up their computer. The talks last typically 45 minutes, and are followed by a discussion time.

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