Giant multiphononic effects in a perovskite oxide

被引：8

作者：

Cazorla, Claudio ^{[1
]}

Stengel, Massimiliano ^{[2
,3
]}

Iniguez, Jorge ^{[4
,5
]}

Rurali, Riccardo ^{[2
]}

机构：

[1] Univ Politecn Cataluna, Dept Fis, Campus Nord B4-B5, Barcelona 08034, Spain

[2] ICMAB CSIC, Inst Ciencia Mat Barcelona, Campus UAB, Bellaterra 08193, Spain

[3] ICREA Inst Catalana Recerca & Estudis Avancats, Barcelona 08010, Spain

[4] Luxembourg Inst Sci & Technol LIST, Mat Res & Technol Dept, Ave Hauts Fourneaux 5, L-4362 Esch Sur Alzette, Luxembourg

[5] Univ Luxembourg, Dept Phys & Mat Sci, 41 Rue Brill, L-4422 Belvaux, Luxembourg

来源：

NPJ COMPUTATIONAL MATERIALS | 2023年 / 9卷 / 01期

关键词：

THERMAL-CONDUCTIVITY; HEAT;

D O I：

10.1038/s41524-023-01057-w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Perovskite oxides offer tremendous potential for applications in information storage and energy conversion, owing to a subtle interplay between their spin, charge, orbital and lattice degrees of freedom. Here, we further expand the possible range of perovskite oxides operation towards the fields of thermal management and thermal computing by exploiting an exceptional synergy between different ferroic orders. We propose dynamical control of the heat flow in a distinctive family of perovskite oxides obtained via the application of small electric (similar to 10 kV/cm) and/or magnetic (similar to 1 T) fields. Based on first-principles simulations, we predict a relative heat conductivity variation of similar to 100% in SrMnO3 thin films near room temperature resulting from a phase transition that involves huge changes in both the magnetization and electric polarization. The disclosed giant multiphononic effects are fundamentally caused by anharmonic spin-phonon couplings that strongly influence the mean lifetime of phonons.

引用

页数：7