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Propiedades controlables y dinámicas versátiles del magnetismo topológico merón en el multiferroico de van der Waals
Qirui Cui1,2, Yuqing Ge1, Xiaocheng Bai3
1Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, AlbaNova University Center, SE-10691 Stockholm, Sweden.
iScience
|September 2, 2025
Resumen
Los investigadores descubrieron merones magnéticos sintonizables en multiferroicos de sulfuro de cromo y cobre (CCPS) de una sola capa. El control eléctrico y óptico sobre estos estados magnéticos topológicos abre nuevas posibilidades para los dispositivos espintrónicos.
Área de la Ciencia:
- Física de la materia condensada
- Ciencias de los materiales
- La tecnología Spintronics
Sus antecedentes:
- El control eficiente del magnetismo topológico es vital para los avances tecnológicos y la comprensión fundamental.
- Los multiferroicos de Van der Waals (vdW) ofrecen potencial para la manipulación de espín con eficiencia energética, pero el magnetismo topológico es raro en estos materiales.
Objetivo del estudio:
- Investigar la aparición y el control de los estados magnéticos topológicos en el sulfuro multiferoico de cobre y cromo (CCPS).
- Explorar la influencia de los estímulos eléctricos y ópticos en la dinámica y las propiedades de la merón en CCPS.
Principales métodos:
- Investigación teórica del magnetismo topológico en CCPS de una sola capa.
- Análisis del efecto de la transición antiferroeléctrica a ferroeléctrica (AFE-FE) en las propiedades magnéticas.
- Simulación de los efectos de los pulsos láser ultrarrápidos en la magnetización y la formación de merón.
Principales resultados:
- Se observaron merones y antimerones altamente sintonizables en el CCPS monocapa.
- La transición AFE-FE redujo la densidad de merón y aumentó el tamaño de merón, con una atracción única y una dinámica de aniquilación que genera ondas de giro.
- Los pulsos láser ultrarrápidos indujeron merones sintonizables por ferroelectricidad, creando diferencias significativas en la densidad de merón entre las fases AFE y FE.
Conclusiones:
- El CCPS monocapa exhibe un magnetismo topológico controlable, específicamente merones y antimerones.
- Los métodos eléctricos y ópticos pueden ajustar efectivamente las propiedades y la dinámica de estos estados magnéticos topológicos.
- Los hallazgos avanzan en la comprensión del magnetismo topológico y sus aplicaciones potenciales en dispositivos espintrónicos de próxima generación.
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