8 papers
Near-room-temperature magnetoelectric coupling engineered through inversion-breaking tilts in a bulk perovskite polytype
Struan Simpson, Urmimala Dey, Martin R. Lees +3
Systematic strategies to design properties such as ferroelectricity or magnetoelectric coupling are well established in simple perovskite materials, but they remain scarce in more…
Chiral soft mode transition driven by strain in ferroelectric bubble domains
Urmimala Dey, Natalya S. Fedorova, Jorge Ãñiguez-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…
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…
Prediction of Room Temperature Electric Field Reversal of Magnetization in the Family of Layered Oxides
Urmimala Dey, Emma E. McCabe, Jorge Ãñiguez-González +1
The promise of a strong magnetoelectric coupling in a multiferroic material is not only of fundamental interest, but also forms the basis of next generation memory devices where th…
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…