60 citations · 156 across the 17 of their papers we have counts for
6 papers · 1 filter
Chiral soft mode transition driven by strain in ferroelectric bubble domains
Urmimala Dey, Natalya S. Fedorova, Jorge Íñiguez-González +1
Chirality in solids is attracting growing attention as a potential ferroic order, yet virtually no paradigmatic example of a soft-mode achiral-to-chiral phase transition has been f…
Pressure-induced orbital reordering in NaCuF
Craig I. Hiley, Catriona A. Crawford, Craig L. Bull +5
The high-pressure behaviour of NaCuF is explored by powder neutron diffraction and density functional theory (DFT) calculations. A first-order phase transition is observed…
Goldstone-mediated polar instability in hexagonal barium titanate
S. Simpson, U. Dey, R. J. Sjökvist +5
We discover a rare structural manifestation of the Goldstone paradigm in a hexagonal polytype of the archetypal ferroelectric BaTiO3. First-principles calculations confirm the Gold…
Dielectric softening in the halide double perovskites Au (: Cs, Rb; : Cl, Br, I) via a strain-mediated pseudotriggered mechanism
Urmimala Dey, Jordan A. R. Cowell, Nicholas C. Bristowe
Halide perovskites have emerged as promising candidates for next generation photovoltaic applications, attracting significant attention in recent years. Through first-principles ca…
Electronic structure fingerprints of visible-range excitons in double perovskite oxides
Bhagyashree Behera, Debatri Ash, Urmimala Dey +6
Presence of excitons significantly influence the optoelectronic properties and potential applications of materials. Using combined theoretical and experimental tools, we investigat…
Pressure induced enhancement of polar distortions in a metal, and implications on the Rashba spin-splitting
Evie Ladbrook, Urmimala Dey, Nicholas C. Bristowe +4
Polar metals are an intriguing class of materials in which electric polarisation and metallicity can coexist within a single phase. The unique properties of polar metals challenge…