23 citations · 27 across the 3 of their papers we have counts for
6 papers · 1 filter
Large dynamic scissoring mode displacements coupled to band gap opening in Hybrid Perovskites
Tobias A. Bird, Jungshen Chen, Manila Songvilay +4
Hybrid perovskites are a rapidly growing research area, having reached photovoltaic power conversion efficiencies of over 25 \%. We apply a symmetry-motivated analysis method to an…
From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilisation
Fernando Pomiro, Chris Ablitt, Nicholas C. Bristowe +4
Hybrid improper ferroelectrics (HIFs) have been intensely studied over the last few years to gain understanding of their temperature induced phase transitions and ferroelectric swi…
Anharmonicity and scissoring modes in the negative thermal expansion materials ScF and CaZrF
Tobias Bird, Jessica Woodland-Scott, Lei Hu +4
We use a symmetry-motivated approach to analysing X-ray pair distribution functions to study the mechanism of negative thermal expansion in two ReO-like compounds; ScF and…
A Corkscrew Model for Highly Coupled Anisotropic Compliance in Ruddlesden-Popper Oxides with Frozen Octahedral Rotations
Chris Ablitt, Mark S. Senn, Nicholas C. Bristowe +1
A "corkscrew" mechanism, that couples changes in the in-plane rotation angle to strains along the layering axis, has been proposed previously to explain increased compliance in cer…
A Group-theoretical Approach to Enumerating Magnetoelectric and Multiferroic Couplings in Perovskites
Mark S. Senn, Nicholas C. Bristowe
We use a group theoretical approach to enumerate the possible couplings between magnetism and ferroelectric polarisation in the parent perovskite structure. We show th…
Recipes for improper ferroelectricity in hybrid perovskites
Hanna L B Boström, Mark S Senn, Andrew L Goodwin
The central goal of crystal engineering is to develop precise control over material function \emph{via} rational design of structure. A particularly successful realisation of this…