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Transistor sináptico Moiré con funcionalidad neuromórfica a temperatura ambiente

Xiaodong Yan1, Zhiren Zheng2, Vinod K Sangwan1

  • 1Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.

Nature
|December 20, 2023
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un transistor sináptico moiré a temperatura ambiente utilizando grafeno de dos capas asimétrico y nitruro de boro hexagonal. Este avance permite la inyección de carga no volátil de baja potencia para hardware avanzado de IA y aplicaciones de computación neuromórfica.

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Área de la Ciencia:

  • Física de la materia condensada
  • Ciencias de los materiales
  • Nanotecnología

Sus antecedentes:

  • Los materiales cuánticos de Moiré exhiben fenómenos electrónicos exóticos debido a las interacciones de Coulomb en heteroestructuras 2D retorcidas.
  • Los materiales atómicamente delgados ofrecen un alto control electrostático, prometiendo dispositivos electrónicos avanzados.
  • Los fenómenos moiré actuales están restringidos a temperaturas criogénicas, lo que dificulta las aplicaciones prácticas.

Objetivo del estudio:

  • Realizar y demostrar experimentalmente el funcionamiento a temperatura ambiente de un transistor sináptico moiré.
  • Aprovechar el potencial asimétrico de las nuevas funcionalidades electrónicas.
  • Para permitir la computación eficiente en la memoria y aceleradores de hardware de IA.

Principales métodos:

  • Fabricación de una estructura heterogénea asimétrica de grafeno y nitruro de boro hexagonal.
  • Utilizando el potencial de moiré para crear estados electrónicos de trinquete.
  • El uso de puertas asimétricas en dispositivos de doble puerta para funciones neuromórficas.

Principales resultados:

  • Se logró el funcionamiento a temperatura ambiente de un transistor sináptico moiré de baja potencia (20 pW).
  • Se ha demostrado la inyección de un portador de carga no volátil controlado por un potencial de moiré asimétrico.
  • Realizó diversas funcionalidades neuromórficas biorrealistas que incluyen respuestas sinápticas reconfigurables y tempotrones.

Conclusiones:

  • El transistor sináptico moiré desarrollado funciona eficientemente a temperatura ambiente.
  • Esta tecnología allana el camino para la computación neuromórfica práctica y de baja potencia y el hardware de IA.
  • Las heteroestructuras asimétricas de moiré son una plataforma prometedora para los dispositivos electrónicos de próxima generación.