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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
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Ferroelectricidad interfacial por deslizamiento de Van der Waals
M Vizner Stern1, Y Waschitz1, W Cao2
1School of Physics and Astronomy, Tel Aviv University, Israel.
Science (New York, N.Y.)
|June 11, 2021
Resumen
Los investigadores descubrieron el orden ferroeléctrico en las interfaces hexagonales de nitruro de boro (hBN). Este avance permite la nueva "slidetrónica" mediante el control de la polarización con deslizamiento lateral, abriendo nuevas vías en la ciencia de los materiales.
Área de la Ciencia:
- Ciencias de los materiales
- Física de la materia condensada
- Nanotecnología
Sus antecedentes:
- Los cristales diatómicos en capas a menudo carecen de polarización eléctrica debido al apilamiento centrosimétrico.
- El nitruro de boro hexagonal (hBN) es un material en capas clave con potencial para nuevas propiedades electrónicas.
Objetivo del estudio:
- Investigar el surgimiento del orden ferroeléctrico en las interfaces del nitruro de boro hexagonal.
- Para explorar el mecanismo y el comportamiento de conmutación de esta nueva ferroelectricidad interfacial.
Principales métodos:
- Síntesis experimental de escamas de nitruro de boro hexagonales apiladas en una orientación metastable.
- Microscopía de fuerza atómica con una punta sesgada para sondear y manipular la polarización.
- Primeros cálculos para entender la física subyacente.
Principales resultados:
- Observación del orden ferroeléctrico estable en la interfaz hBN.
- Identificación de dominios de polarización alternos impulsados por desplazamientos laterales de la red.
- Demostración del cambio de polarización reversible mediante deslizamiento lateral.
Conclusiones:
- El apilamiento interfacial en hBN puede inducir la ferroelectricidad, desviándose de las propiedades a granel.
- El fenómeno está enraizado en una combinación de redistribución de carga y desplazamiento iónico.
- Este descubrimiento introduce un nuevo paradigma para la polarización interfacial y
- Slidetrónica
- - ¿ Qué ?
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