Title
Characterization of the size and position of electronhole puddles at a graphene pn junction Characterization of the size and position of electronhole puddles at a graphene pn junction
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol ,
Subject
Physics
Engineering sciences. Technology
Source (journal)
Nanotechnology. - Bristol
Volume/pages
27(2016) :10 , 6 p.
ISSN
0957-4484
0957-4484
Article Reference
105203
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The effect of an electronhole puddle on the electrical transport when governed by snake states in a bipolar graphene structure is investigated. Using numerical simulations we show that information on the size and position of the electronhole puddle can be obtained using the dependence of the conductance on magnetic field and electron density of the gated region. The presence of the scatterer disrupts snake state transport which alters the conduction pattern. We obtain a simple analytical formula that connects the position of the electronhole puddle with features observed in the conductance. The size of the electronhole puddle is estimated from the magnetic field and gate potential that maximizes the effect of the puddle on the electrical transport.
E-info
https://repository.uantwerpen.be/docman/iruaauth/99e561/131907.pdf
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