CER - Central Repository
Institute of Chemistry, Technology and Metallurgy
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrillic)
    • Serbian (Latin)
  • Login
View Item 
  •   CER
  • IHTM
  • Radovi istraživača / Researchers' publications
  • View Item
  •   CER
  • IHTM
  • Radovi istraživača / Researchers' publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Ballistic transport through graphene nanostructures of velocity and potential barriers

Authorized Users Only
2011
Authors
Krstajić, Predrag
Vasilopoulos, Panagiotis
Article (Published version)
Metadata
Show full item record
Abstract
We investigate the electronic properties of graphene nanostructures when the Fermi velocity and the electrostatic potential vary in space. First, we consider the transmission T and conductance G through single and double barriers. We show that G for velocity barriers differs markedly from that for potential barriers for energies below the height of the latter and it exhibits periodic oscillations as a function of the energy for strong velocity modulation. Special attention is given to superlattices (SLs). It is shown that an applied bias can efficiently widen or shrink the allowed minibands of velocity-modulated SLs. The spectrum in the Kronig-Penney limit is periodic in the strength of the barriers. Collimation of an electron beam incident on an SL with velocity and potential barriers is present but it disappears when the potential barriers are absent. The number of additional Dirac points may change considerably if barriers and wells have sufficiently different Fermi velocities.
Source:
Journal of Physics-Condensed Matter, 2011, 23, 13
Publisher:
  • Iop Publishing Ltd, Bristol
Funding / projects:
  • Canadian NSERC - OGP0121756

DOI: 10.1088/0953-8984/23/13/135302

ISSN: 0953-8984

PubMed: 21403236

WoS: 000288749300006

Scopus: 2-s2.0-79953646421
[ Google Scholar ]
49
39
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/905
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/905
AB  - We investigate the electronic properties of graphene nanostructures when the Fermi velocity and the electrostatic potential vary in space. First, we consider the transmission T and conductance G through single and double barriers. We show that G for velocity barriers differs markedly from that for potential barriers for energies below the height of the latter and it exhibits periodic oscillations as a function of the energy for strong velocity modulation. Special attention is given to superlattices (SLs). It is shown that an applied bias can efficiently widen or shrink the allowed minibands of velocity-modulated SLs. The spectrum in the Kronig-Penney limit is periodic in the strength of the barriers. Collimation of an electron beam incident on an SL with velocity and potential barriers is present but it disappears when the potential barriers are absent. The number of additional Dirac points may change considerably if barriers and wells have sufficiently different Fermi velocities.
PB  - Iop Publishing Ltd, Bristol
T2  - Journal of Physics-Condensed Matter
T1  - Ballistic transport through graphene nanostructures of velocity and potential barriers
VL  - 23
IS  - 13
DO  - 10.1088/0953-8984/23/13/135302
UR  - Conv_2604
ER  - 
@article{
author = "Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2011",
abstract = "We investigate the electronic properties of graphene nanostructures when the Fermi velocity and the electrostatic potential vary in space. First, we consider the transmission T and conductance G through single and double barriers. We show that G for velocity barriers differs markedly from that for potential barriers for energies below the height of the latter and it exhibits periodic oscillations as a function of the energy for strong velocity modulation. Special attention is given to superlattices (SLs). It is shown that an applied bias can efficiently widen or shrink the allowed minibands of velocity-modulated SLs. The spectrum in the Kronig-Penney limit is periodic in the strength of the barriers. Collimation of an electron beam incident on an SL with velocity and potential barriers is present but it disappears when the potential barriers are absent. The number of additional Dirac points may change considerably if barriers and wells have sufficiently different Fermi velocities.",
publisher = "Iop Publishing Ltd, Bristol",
journal = "Journal of Physics-Condensed Matter",
title = "Ballistic transport through graphene nanostructures of velocity and potential barriers",
volume = "23",
number = "13",
doi = "10.1088/0953-8984/23/13/135302",
url = "Conv_2604"
}
Krstajić, P.,& Vasilopoulos, P.. (2011). Ballistic transport through graphene nanostructures of velocity and potential barriers. in Journal of Physics-Condensed Matter
Iop Publishing Ltd, Bristol., 23(13).
https://doi.org/10.1088/0953-8984/23/13/135302
Conv_2604
Krstajić P, Vasilopoulos P. Ballistic transport through graphene nanostructures of velocity and potential barriers. in Journal of Physics-Condensed Matter. 2011;23(13).
doi:10.1088/0953-8984/23/13/135302
Conv_2604 .
Krstajić, Predrag, Vasilopoulos, Panagiotis, "Ballistic transport through graphene nanostructures of velocity and potential barriers" in Journal of Physics-Condensed Matter, 23, no. 13 (2011),
https://doi.org/10.1088/0953-8984/23/13/135302 .,
Conv_2604 .

DSpace software copyright © 2002-2015  DuraSpace
About CeR – Central Repository | Send Feedback

re3dataOpenAIRERCUB
 

 

All of DSpaceInstitutions/communitiesAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About CeR – Central Repository | Send Feedback

re3dataOpenAIRERCUB