Controlling resonant tunneling in graphene via Fermi velocity engineering

Journal Article · Tue Jun 28 00:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4953865· OSTI ID:22596828

Lima, Jonas R. F., ^[1]; Pereira, Luiz Felipe C.; Bezerra, C. G. ^[2]

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1. Departamento de Física, Universidade Federal Rural de Pernambuco, 52171-900 Recife, PE (Brazil)
2. Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, 59078-970 Natal, RN (Brazil)

We investigate the resonant tunneling in a single layer graphene superlattice with modulated energy gap and Fermi velocity via an effective Dirac-like Hamiltonian. We calculate the transmission coefficient with the transfer matrix method and analyze the effect of a Fermi velocity modulation on the electronic transmission, in the case of normal and oblique incidence. We find it is possible to manipulate the electronic transmission in graphene by Fermi velocity engineering, and show that it is possible to tune the transmitivity from 0 to 1. We also analyze how a Fermi velocity modulation influences the total conductance and the Fano factor. Our results are relevant for the development of novel graphene-based electronic devices.

• OSTI ID: 22596828
• Journal Information: Journal of Applied Physics, Vol. 119, Issue 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIRAC OPERATORS
ELECTRONIC EQUIPMENT
ENERGY GAP
FANO FACTOR
FERMI STATISTICS
GRAPHENE
HAMILTONIANS
LAYERS
MODULATION
SUPERLATTICES
TRANSFER MATRIX METHOD
TRANSMISSION
TUNNEL EFFECT
VELOCITY