Electron confinement in graphene with gate-defined quantum dots. Fehske, H., Hager, G., & Pieper, A. physica status solidi (b), 252(8):1868--1871, August, 2015.
Electron confinement in graphene with gate-defined quantum dots [link]Paper  doi  abstract   bibtex   
We theoretically analyse the possibility to electrostatically confine electrons in circular quantum dot arrays, impressed on contacted graphene nanoribbons by top gates. Utilising exact numerical techniques, we compute the scattering efficiency of a single dot and demonstrate that for small-sized scatterers the cross-sections are dominated by quantum effects, where resonant scattering leads to a series of quasi-bound dot states. Calculating the conductance and the local density of states for quantum dot superlattices, we show that the resonant carrier transport through such graphene-based nanostructures can be easily tuned by varying the gate voltage. Schematic representation of a Dirac electron wave packet impinging on a circular, electrostatically defined quantum dot.
@article{fehske_electron_2015,
	title = {Electron confinement in graphene with gate-defined quantum dots},
	volume = {252},
	copyright = {© 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim},
	issn = {1521-3951},
	url = {http://onlinelibrary.wiley.com/doi/10.1002/pssb.201552119/abstract},
	doi = {10.1002/pssb.201552119},
	abstract = {We theoretically analyse the possibility to electrostatically confine electrons in circular quantum dot arrays, impressed on contacted graphene nanoribbons by top gates. Utilising exact numerical techniques, we compute the scattering efficiency of a single dot and demonstrate that  for small-sized scatterers the cross-sections are dominated by quantum effects, where resonant scattering leads to a series of quasi-bound dot states. Calculating the conductance and the local density of states for quantum dot superlattices, we show that the resonant carrier transport through such graphene-based nanostructures  can be easily tuned by varying the gate voltage.
Schematic representation of a Dirac electron wave packet impinging on a circular, electrostatically defined quantum dot.},
	language = {en},
	number = {8},
	urldate = {2016-01-26},
	journal = {physica status solidi (b)},
	author = {Fehske, Holger and Hager, Georg and Pieper, Andreas},
	month = aug,
	year = {2015},
	keywords = {electronic transport, graphene-based nanostructures, particle confinement, quantum dot arrays, scattering},
	pages = {1868--1871},
	file = {Fehske et al_2015_Electron confinement in graphene with gate-defined quantum dots.pdf:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/XZVK8HPR/Fehske et al_2015_Electron confinement in graphene with gate-defined quantum dots.pdf:application/pdf;Snapshot:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/PPZ3DPAC/abstract.html:text/html}
}

Downloads: 0