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La deslocalización de buques de transporte colectivo impulsada por la acumulación de carga superficial electrostática
M Nakano1, K Shibuya, D Okuyama
1Correlated Electron Research Group and Cross-correlated Materials Research Group, RIKEN Advanced Science Institute, Wako 351-0198, Japan. mnakano@riken.jp
Nature
|July 28, 2012
Resumen
Los investigadores desarrollaron un nuevo dispositivo de efecto de campo utilizando dióxido de vanadio. Este dispositivo permite el control de fase electrónico macroscópico al cambiar la conductividad con un voltaje bajo, ofreciendo efectos de memoria no volátiles.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales ciencia de los materiales.
- Ingeniería de dispositivos de ingeniería de dispositivos.
Sus antecedentes:
- Los transistores controlan la conductividad a través de la tensión externa, lo que permite la conmutación electrónica.
- Los efectos del campo eléctrico en los materiales convencionales se limitan a los canales a escala nanométrica debido al cribado.
- Los materiales fuertemente correlacionados exhiben propiedades electrónicas únicas influenciadas por las interacciones electrón-rejilla.
Objetivo del estudio:
- Investigar el control del campo eléctrico en materiales con interacciones colectivas inherentes.
- Para demostrar un nuevo dispositivo de efecto de campo que supere las limitaciones del cribado convencional.
- Explorar la conmutación no local de los estados electrónicos y los efectos de la memoria.
Principales métodos:
- Fabricación de transistores de efecto de campo de metal- aislador-semiconductor utilizando dióxido de vanadio.
- Aplicación de la carga electrostática a través de una tensión externa.
- Análisis de la respuesta del material a los cambios de tensión, centrándose en la transición metal-aislador.
Principales resultados:
- La carga electrostática indujo a los portadores de carga a granel en movimiento, creando un estado metálico 3D.
- La conmutación de estado electrónico no local se logró con aproximadamente un volt.
- La transición de aislante metálico de primer orden en dióxido de vanadio proporcionó un efecto de memoria no volátil a temperatura ambiente.
Conclusiones:
- Se demostró un nuevo concepto de dispositivo de efecto de campo, que extiende el control de campo eléctrico al control de fase macroscópico.
- Los transistores de dióxido de vanadio muestran potencial para aplicaciones de conmutación electrónica y de memoria con eficiencia energética.
- Este trabajo desafía la comprensión convencional de los efectos del campo eléctrico en los sistemas de materia condensada.
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