2016/12/13 by Claudio Cazorla, Cazorla, Claudio, Oswaldo Diéguez +3 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Ferroelectric and Piezoelectric Materials #Materials Science (cond-mat.mtrl-sci) #Multiferroics and related materials
paper · pdf · doi:10.48550/arxiv.1612.04356
openalex publication_date 2016/12/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Spin-phonon interactions are central to many interesting phenomena, ranging\nfrom superconductivity to magnetoelectric effects. Yet, they are believed to\nhave a negligible influence on the structural behavior of most materials. For\nexample, magnetic perovskite oxides often undergo structural transitions\naccompanied by magnetic signatures whose minuteness suggests that the\nunderlying spin-phonon couplings are largely irrelevant. Here we present an\nexception to this rule, showing that novel effects can occur as a consequence.\nOur first-principles calculations reveal that spin-phonon interactions are\nessential to reproduce the experimental observations on the phase diagram of\nmagnetoelectric multiferroic BiCoO3. Moreover, we predict that, under\ncompression, these couplings lead to an unprecedented temperature-driven\ndouble-reentrant sequence of ferroelectric transitions. We propose how to\nmodify BiCoO3 via chemical doping to reproduce such striking effects at\nambient conditions, thereby yielding useful multifunctionality.\n