"Transport through chiral networks of minimally twisted bilayer graphene"

 

Twisted bilayer graphene (TBG) consists of two graphene sheets on top of each other where one sheet is rotated with respect to the other leading to smooth moiré-like potentials where new physics emerges not shared by a single layer alone. I will discuss minimally TBG (rotation angle well below the magic angle) where an interlayer voltage leads to a network of valley chiral states. We developed a phenomenological scattering theory that only takes into account the basic symmetries of the network [1,2]. I will discuss how different transport phases like a zigzag metallic regime or flatband pseudo-Landau levels emerge within our theory and will also discuss their transport properties in a four-terminal setup including magnetic and electric fields. 

[1] C. De Beule, F. Dominguez, P. Recher, Phys. Rev. Lett. 125, 096402 (2020).

[2] C. De Beule, F. Dominguez, P. Recher, Phys. Rev. B 104, 195410 (2021).

Transmisión vía Youtube en: bit.ly/YouTube_ICF

Participante: Dr. Patrik Recher

Institución: Technische Universität Braunschweig, Germany

Fecha y hora: Este evento terminó el Miércoles, 06 de Abril de 2022