English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/157277
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Coulomb-blockade effect in nonlinear mesoscopic capacitors

AuthorsAlomar, María Isabel; Lim, Jong-Soo ; Sánchez, David
Issue Date15-Oct-2016
PublisherAmerican Physical Society
CitationPhysical Review B 94(16): 165425 (2016)
AbstractWe consider an interacting quantum dot working as a coherent source of single electrons. The dot is tunnel coupled to a reservoir and capacitively coupled to a gate terminal with an applied ac potential. At low frequencies, this is the quantum analog of the RC circuit with a purely dynamical response. We investigate the quantized dynamics as a consequence of ac pulses with large amplitude. Within a Keldysh-Green function formalism we derive the time-dependent current in the Coulomb blockade regime. Our theory thus extends previous models that considered either noninteracting electrons in nonlinear response or interacting electrons in the linear regime. We prove that the electron emission and absorption resonances undergo a splitting when the charging energy is larger than the tunnel broadening. For very large charging energies, the additional peaks collapse and the original resonances are recovered, though with a reduced amplitude. Quantization of the charge emitted by the capacitor is reduced due to Coulomb repulsion and additional plateaus arise. Additionally, we discuss the differential capacitance and resistance as a function of time. We find that to leading order in driving frequency the current can be expressed as a weighted sum of noninteracting currents shifted by the charging energy.
Publisher version (URL)http://doi.org/10.1103/PhysRevB.94.165425
URIhttp://hdl.handle.net/10261/157277
DOI10.1103/PhysRevB.94.165425
ISSN1098-0121
E-ISSN1550-235X
Appears in Collections:(IFISC) Artículos
Files in This Item:
File Description SizeFormat 
coulomb-blockade_Alomar.pdf2,47 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.