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Title: Theory of resonant tunneling in bilayer-graphene/hexagonal-boron-nitride heterostructures

A theory is developed for calculating vertical tunneling current between two sheets of bilayer graphene separated by a thin, insulating layer of hexagonal boron nitride, neglecting many-body effects. Results are presented using physical parameters that enable comparison of the theory with recently reported experimental results. Observed resonant tunneling and negative differential resistance in the current–voltage characteristics are explained in terms of the electrostatically-induced band gap, gate voltage modulation, density of states near the band edge, and resonances with the upper sub-band. These observations are compared to ones from similar heterostructures formed with monolayer graphene.
Authors:
;  [1]
  1. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
Publication Date:
OSTI Identifier:
22412773
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BORON NITRIDES; COMPARATIVE EVALUATIONS; DENSITY OF STATES; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; GRAPHENE; HEXAGONAL LATTICES; LAYERS; MANY-BODY PROBLEM; MODULATION; SHEETS; TUNNEL EFFECT