dc.contributor.author | SANVITO, STEFANO | en |
dc.date.accessioned | 2014-12-17T13:31:42Z | |
dc.date.available | 2014-12-17T13:31:42Z | |
dc.date.issued | 2013 | en |
dc.date.submitted | 2013 | en |
dc.identifier.citation | A. Pertsova, M. Stamenova and S. Sanvito, Time-dependent electron transport through a strongly correlated quantum dot: multiple-probe open-boundary conditions approach, Journal of Physics: Condensed Matter, 25, 10, 2013, 105501- | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description.abstract | We present a time-dependent study of electron transport through a strongly correlated quantum dot. The time-dependent current is obtained with the multiple-probe battery method, while adiabatic lattice density functional theory in the Bethe ansatz local-density approximation to the Hubbard model describes the dot electronic structure. We show that for a certain range of voltages the quantum dot can be driven into a dynamical state characterized by regular current oscillations. This is a manifestation of a recently proposed dynamical picture of Coulomb blockade. Furthermore, we investigate how the various approximations to the electron-electron interaction affect the line-shapes of the Coulomb peaks and the I-V characteristics. We show that the presence of the derivative discontinuity in the approximate exchange-correlation potential leads to significantly different results compared to those obtained at the simpler Hartree level of description. In particular, a negative differential conductance (NDC) in the I-V characteristics is observed at large bias voltages and large Coulomb interaction strengths. We demonstrate that such NDC originates from the combined effect of electron-electron interaction in the dot and the finite bandwidth of the electrodes. | en |
dc.format.extent | 105501 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Journal of Physics: Condensed Matter | en |
dc.relation.ispartofseries | 25 | en |
dc.relation.ispartofseries | 10 | en |
dc.rights | Y | en |
dc.subject | Physics | en |
dc.title | Time-dependent electron transport through a strongly correlated quantum dot: multiple-probe open-boundary conditions approach | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/sanvitos | en |
dc.identifier.rssinternalid | 84401 | en |
dc.identifier.doi | http://dx.doi.org/10.1088/0953-8984/25/10/105501 | en |
dc.rights.ecaccessrights | openAccess | |
dc.subject.TCDTheme | Nanoscience & Materials | en |
dc.identifier.rssuri | http://iopscience.iop.org/0953-8984/25/10/105501/ | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | G20267 | en |
dc.identifier.uri | http://hdl.handle.net/2262/72558 | |