S. Simpson

activity

20242026

collaborators

3 papers

cond-mat.mtrl-sci2026

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…

cond-mat.mtrl-sci2025

Goldstone-mediated polar instability in hexagonal barium titanate

S. Simpson, U. Dey, R. J. SjÃ¶kvist +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…

cond-mat.str-el2024

Intrinsic electronic phase separation and competition between $G$ -type, $C$ -type and $C E$ -type charge and orbital ordering modes in Hg $_{1 - x}$ Na $_{x}$ Mn $_{3}$ Mn $_{4}$ O $_{12}$

Ben R. M. Tragheim, Struan Simpson, En-Pei Liu +2

The novel series of hole-doped quadruple manganite perovskites Hg $_{1 - x}$ Na $_{x}$ Mn $_{3}$ Mn $_{4}$ O $_{12}$ (HNMO) has been synthesized and its charge and orbital order behavior investigat…

Near-room-temperature magnetoelectric coupling engineered through inversion-breaking tilts in a bulk perovskite polytype

Goldstone-mediated polar instability in hexagonal barium titanate

Intrinsic electronic phase separation and competition between G-type, C-type and CE-type charge and orbital ordering modes in Hg1−x​Nax​Mn3​Mn4​O12​

Intrinsic electronic phase separation and competition between $G$ -type, $C$ -type and $C E$ -type charge and orbital ordering modes in Hg $_{1 - x}$ Na $_{x}$ Mn $_{3}$ Mn $_{4}$ O $_{12}$