Accessing ratios of quantized resistances in graphene p–n junction devices using multiple terminals

Autor: Dinesh Patel, Martina Marzano, Chieh-I Liu, Heather M. Hill, Mattias Kruskopf, Hanbyul Jin, Jiuning Hu, David B. Newell, Chi-Te Liang, Randolph Elmquist, Albert F. Rigosi
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: AIP Advances, Vol 10, Iss 2, Pp 025112-025112-6 (2020)
Druh dokumentu: article
ISSN: 2158-3226
DOI: 10.1063/1.5138901
Popis: The utilization of multiple current terminals on millimeter-scale graphene p–n junction devices has enabled the measurement of many atypical, fractional multiples of the quantized Hall resistance at the ν = 2 plateau (RH ≈ 12 906 Ω). These fractions take the form abRH and can be determined both analytically and by simulations. These experiments validate the use of either the LTspice circuit simulator or the analytical framework recently presented in similar work. Furthermore, the production of several devices with large-scale junctions substantiates the approach of using simple ultraviolet lithography to obtain junctions of sufficient sharpness.
Databáze: Directory of Open Access Journals