Bloch oscillations in the magnetoconductance of twisted bilayer graphene

Autor:	Vakhtel, T., Oriekhov, D. O., Beenakker, C. W. J.
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 105, L241408 (2022)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.105.L241408
Popis:	We identify a mapping between two-dimensional (2D) electron transport in a minimally twisted graphene bilayer and a 1D quantum walk, where one spatial dimension plays the role of time. In this mapping a magnetic field B perpendicular to the bilayer maps onto an electric field. Bloch oscillations due to the periodic motion in a 1D Bloch band can then be observed in purely DC transport as magnetoconductance oscillations with periodicity set by the Bloch frequency. Comment: 6 pages, 7 figures, Note added: A semiclassical theory for the side branches in figure 4b is given in Appendix B of arXiv:2207.10066
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2203.01858 Zobrazit plný text záznamu View this record from Arxiv