Atypical Quantized Resistances in Millimeter-Scale Epitaxial Graphene p-n Junctions.

ABSTRACT: We have demonstrated the millimeter-scale fabrication of monolayer epitaxial graphene p-n junction devices using simple ultraviolet photolithography, thereby significantly reducing device processing time compared to that of electron beam lithography typically used for obtaining sharp junctions. This work presents measurements yielding nonconventional, fractional multiples of the typical quantized Hall resistance at ν = 2 (RH ≈ 12906 Ω) that take the form: abRH . Here, a and b have been observed to take on values such 1, 2, 3, and 5 to form various coefficients of RH. Additionally, we provide a framework for exploring future device configurations using the LTspice circuit simulator as a guide to understand the abundance of available fractions one may be able to measure. These results suppor

SUBMITTER: Rigosi AF 

PROVIDER: S-EPMC7067286 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature