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Ajustable Spin Altermagnético Oculto Dividiéndose en capas de Óxidos de Ruddlesden-Popper Ajustable en capas
Tongxie Zhang1, Linding Yuan2, James M Rondinelli2
1Department of Physics, Indiana University, Bloomington, Indiana 47405, United States.
Nano letters
|February 10, 2026
Resumen
Los altermagnetos, una nueva clase de materiales, muestran una división de espín útil para la espintrónica. Los investigadores encontraron formas de controlar esta división en óxidos utilizando campos eléctricos y vacíos de oxígeno.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales Ciencia de los materiales.
- Spintronics es una empresa de Spintronics.
Sus antecedentes:
- Los altermagnetos (AM) son antiferromagnetos colineares con magnetización compensada, pero exhiben una división de espín no relativista.
- Los AM combinan las ventajas de los ferromagnetos y los antiferromagnetos convencionales, ofreciendo potencial para dispositivos espintrónicos avanzados.
Objetivo del estudio:
- Investigar la existencia y el control de la división de espín altermagnético en capas de óxidos de Ruddlesden-Popper.
- Explorar estrategias para hacer que la división de espín local sea globalmente aparente y sintonizable para aplicaciones espintrónicas.
Principales métodos:
- El análisis de simetría es el análisis de simetría.
- Los cálculos de los primeros principios.
- Aplicación de efecto de campo eléctrico.
- La estequiometría de oxígeno es una ingeniería de oxígeno.
Principales resultados:
- La división de espín altermagnético se encuentra localmente en los óxidos de Ruddlesden-Popper en capas, pero está oculta con un número par de capas de perovskita.
- Un efecto de campo eléctrico puede hacer que la división de espín local sea globalmente aparente rompiendo la simetría de inversión.
- Las vacantes de oxígeno mejoran la escisión de espín, y las vacantes de oxígeno apical inducen una transición aislante a metal.
Conclusiones:
- Los óxidos de Ruddlesden-Popper en capas pueden albergar propiedades altermagnéticas.
- Los campos eléctricos y la ingeniería de estequiometría de oxígeno son estrategias efectivas para afinar el comportamiento altermagnético.
- Esta investigación amplía las plataformas de materiales para AM y proporciona vías para el desarrollo de dispositivos antiferromagnéticos espintrónicos.
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