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Una válvula de valle y divisor de haz de electrones

Jing Li1, Rui-Xing Zhang1, Zhenxi Yin1

  • 1Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.

Science (New York, N.Y.)
|December 8, 2018
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Resumen

Los investigadores demuestran un nuevo dispositivo electrónico que utiliza grafeno de dos capas. Este dispositivo controla el flujo de electrones utilizando fenómenos específicos del valle, lo que permite aplicaciones como divisores de haz sintonizables para redes cuánticas.

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Área de la Ciencia:

  • Física de la materia condensada
  • Ciencias de los materiales
  • La electrónica cuántica

Sus antecedentes:

  • El avance de la electrónica más allá del silicio requiere nuevos mecanismos físicos.
  • Los materiales hexagonales bidimensionales ofrecen fenómenos únicos específicos del valle para nuevos paradigmas electrónicos.

Objetivo del estudio:

  • Para realizar y controlar el valle balístico Hall kink en el grafeno de dos capas.
  • Para demostrar un dispositivo de enrutamiento de cuatro curvas funcional para aplicaciones electrónicas.

Principales métodos:

  • Fabricación de un dispositivo de grafeno de dos capas.
  • Utilizando el voltaje controlado por la puerta para la transmisión de corriente.
  • Aprovechando el impulso del valle de bloqueo de estados torcidos.

Principales resultados:

  • Se ha demostrado que el Valle Ballístico Hall está alterado.
  • Logrado la transmisión de corriente controlada por la puerta en un enrutador de cuatro curvas.
  • Se mostraron las operaciones de guía de onda, válvula y divisor de haz de electrones sintonizables.
  • La válvula del valle alcanzó una relación de encendido/apagado de 8 sin un campo magnético.

Conclusiones:

  • Los estados de torsión del grafeno Bilayer permiten nuevas funcionalidades electrónicas.
  • El dispositivo demostrado funciona como un divisor de haz coherente sintonizable con campo magnético.
  • Estos hallazgos proporcionan una vía para redes de transporte cuántico escalables.