69 citations · 210 across the 19 of their papers we have counts for
24 papers
Broken Inversion Symmetry via a Magic Methyl Effect
Calum J Gibb, Jordan Hobbs, Caitlin O Brien +4
Polar liquid crystals - fluid phases in which molecular dipoles organise into ferro- or antiferroelectric states - present a highly constrained molecular design space, where small…
Direct visualization of local electric fields in a layer of a ferroelectric nematic liquid
Anej Sterle, Natan Osterman, Calum J. Gibb +4
Ferroelectric nematic liquids exhibit complex ferroelectric domains shaped by competing elastic and electrostatic interactions. Using fluorescence and polarizing optical microscopy…
Molecular Hyperpolarisability as a Screening Descriptor for Second-Order Nonlinear Optics in Ferroelectric Nematic Liquid Crystals
Charles Parton-Barr, Nerea Sebastian, Richard Mandle
Ferroelectric nematic liquid crystals combine fluidity with macroscopic polar order. Although the archetypal NF material RM734 exhibits large nonlinear optical coefficients, most k…
Exotic topological defects and director fields in free-floating spherical ferroelectric nematic liquid crystal shells
Churchill B. Agoni, Ema Pilih, Luka Cmok +5
Ferroelectric nematic (NF) liquid crystals exhibit polar symmetry and large polarization, giving rise to phenomena absent in conventional apolar nematics. We investigate NF liquid…
Elasticity-Driven Periodic Polarization Patterns in Confined Chiral Ferroelectric Nematic Fluid
Anej Sterle, Peter Medle-Rupnik, Luka Cmok +9
Ferroelectric nematic phases are a new class of polar fluids in which spontaneous polarization is directly coupled to the orientational order, providing unique opportunities for cr…
Polarization Plasticity of Ferroelectric Nematics: a case of Electrostatic Frustration in Simple Planar Electrode Cells
Stefano Marni, Federico Caimi, Luca Casiraghi +5
Because of their spontaneous bulk polarization, ferroelectric nematic liquid crystals can be easily brought by surface coupling or confinement in a state in which the accumulation…
Data-Driven Prediction of Dielectric Anisotropy in Nematic Liquid Crystals
Charles Parton-Barr, Richard J. Mandle
We curate a large-scale dataset of low frequency dielectric anisotropy values for low molecular weight liquid crystals. Using this dataset, we demonstrate that supervised machine-l…
Design Principles for Fluid Molecular Ferroelectrics
Calum J Gibb, Jordan Hobbs, William C Ogle +1
Fluid molecular ferroelectrics are a new class of organic materials where ferroelectricity is found in conjunction with 3D fluidity whilst still retaining spontaneous polarization…
Modulated Anti-Ferroelectric Smectic Phases with Orthogonal and Tilted Structures
Jordan Hobbs, Calum J. Gibb, William C. Ogle +5
The discovery of the ferroelectric nematic phase has brought with it a plethora of new polar liquid crystalline phases. One in particular is the anti-ferroelectric smectic A SmA\te…
Flexoelectricity-driven softening of bend elasticity leads to spontaneous chiral symmetry breaking in a polar fluid
Aitor Erkoreka, Josu Martinez-Perdiguero, Luka Cmok +6
The origin of the recently observed spontaneous chiral symmetry breaking in polar fluids composed of achiral molecules is an unsolved problem, raising fundamental questions about h…
Deep learning directed synthesis of fluid ferroelectric materials
Charles Parton-Barr, Stuart R. Berrow, Calum J. Gibb +6
Fluid ferroelectrics, a recently discovered class of liquid crystals that exhibit switchable, long-range polar order, offer opportunities in ultrafast electro-optic technologies, r…
Large electrocaloric strength in ferroelectric nematic liquid crystals with a tuneable operational temperature range
Diana I. Nikolova, Rachel Tuffin, Mengfan Guo +5
The electrocaloric (EC) effect offers a promising energy-efficient and clean cooling technology. We present the first direct measurements of EC temperature change in a new family o…
Ferroelectric Fluids for Nonlinear Photonics: Evaluation of Temperature Dependence of Second-Order Susceptibilities
Matija Lovšin, Luka Cmok, Calum J. Gibb +5
Ferroelectric nematic fluids are promising materials for tunable nonlinear photonics, with applications ranging from second harmonic generation to sources of entangled photons. How…
Polarity from the Bottom Up: A Computational Framework for Predicting Spontaneous Polar Order
Jordan Hobbs, Calum J. Gibb, Richard J. Mandle
So-called polar liquid crystals possess spontaneous long-range mutual orientation of their electric dipole moments, conferring bulk polarity to fluid phases of matter. The combinat…
Static and hydrodynamic periodic structures induced by AC electric fields in the antiferroelectric SmZA phase
K. S. Krishnamurthy, S. Krishna Prasad, D. S. Shankar Rao +4
We report the effect of AC electric fields in the range of 0.1-300 kHz on planar antiferroelectric SmZA layers of DIO. Significant results are (a) primary bifurcation into a quasis…
Ultra-stretchable and Self-Healable Vitrimers with Tuneable Damping and Mechanical Response
Jiaxin Zhao, Nicholas J. Warren, Richard Mandle +4
Vitrimers are a relatively new class of polymer materials with unique properties offered by cross-links that can undergo associative exchange dynamics. We here present a new class…
Ferri- and Ferro-Electric Switching in Spontaneously Chiral Polar Liquid Crystals
Jordan Hobbs, Calum J. Gibb, Richard J. Mandle
The recent discovery of spontaneous chiral symmetry breaking has demonstrated the possibility of discovering the exotic textures of ferromagnetic systems in liquid crystalline flui…
Systematic Fluorination is a Powerful Design Strategy Towards Fluid Molecular Ferroelectrics
Calum J. Gibb, Jordan Hobbs, Richard J. Mandle
Ferroelectric nematic (NF) liquid crystals combine liquid-like fluidity and orientational order of conventional nematics with macroscopic electric polarization comparable in magnit…
A fast transferable method for predicting the glass transition temperature of polymers from chemical structure
Sebastian Brierley-Croft, Peter D. Olmsted, Peter J. Hine +4
We present a new method that successfully predicts the glass transition temperature of polymers based on their monomer structure. The model combines ideas from…
Antiferroelectric order in nematic liquids: Flexoelectricity vs electrostatics
Peter Medle Rupnik, Ema Hanžel, Matija Lovšin +5
The recent discovery of ferroelectric nematic liquid crystalline phases marks a major breakthrough in soft matter research. An intermediate phase, often observed between the nonpol…
Polar order in a fluid like ferroelectric with a tilted lamellar structure -- observation of a polar smectic C (SmC) phase
Jordan Hobbs, Calum J. Gibb, Damian Pociecha +3
The discovery of fluid states of matter with spontaneous bulk polar order is appreciated as a major discovery in the fields of soft matter and liquid crystals. Typically, this mani…
Emergent Anti-Ferroelectric Ordering and the Coupling of Liquid Crystalline and Polar Order
Jordan Hobbs, Calum J. Gibb, Richard. J. Mandle
Polar liquid crystals possess three dimensional orientational order coupled with unidirectional electric polarity, yielding fluid ferroelectrics. Such polar phases are generated by…
Rapid Conformational Analysis of Semi-Flexible Liquid Crystals
Jordan L. Hobbs, Calum J. Gibb, Ewan Cruickshank +2
We present an approach for rapid conformational analysis of semi-flexible liquid crystals. We use a simple graphical user interface (GUI) tool that leverages rules-based methods fo…
Spontaneous Symmetry Breaking in Polar Fluids
Calum Gibb, Jordan Hobbs, Diana Nikolova +3
Spontaneous symmetry breaking and emergent polar order are each of fundamental importance to a range of scientific disciplines, as well as generating rich phase behaviour in liquid…