Prediction of femtosecond oscillations in the transient current of a quantum dot in the Kondo regime

Handle URI:
http://hdl.handle.net/10754/315796
Title:
Prediction of femtosecond oscillations in the transient current of a quantum dot in the Kondo regime
Authors:
Goker, A.; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Schwingenschlögl, Udo ( 0000-0003-4179-7231 ) ; Zhu, Zhiyong
Abstract:
We invoke the time-dependent noncrossing approximation in order to study the effects of the density of states of gold contacts on the instantaneous conductance of a single electron transistor which is abruptly moved into the Kondo regime by means of a gate voltage. For an asymmetrically coupled system, we observe that the instantaneous conductance in the Kondo time scale exhibits beating with distinct frequencies, which are proportional to the separation between the Fermi level and the sharp features in the density of states of gold. Increasing the ambient temperature or bias quenches the amplitude of the oscillations. We attribute the oscillations to interference between the emerging Kondo resonance and van-Hove singularities in the density of state. In addition, we propose an experimental realization of this model.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Computational Physics and Materials Science (CPMS)
Citation:
Goker A, Zhu ZY, Manchon A, Schwingenschlögl U (2010) Prediction of femtosecond oscillations in the transient current of a quantum dot in the Kondo regime. Phys Rev B 82. doi:10.1103/PhysRevB.82.161304.
Publisher:
American Physical Society
Journal:
Physical Review B
Issue Date:
11-Oct-2010
DOI:
10.1103/PhysRevB.82.161304
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.82.161304; http://arxiv.org/abs/1009.5805
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computational Physics and Materials Science (CPMS)

Full metadata record

DC FieldValue Language
dc.contributor.authorGoker, A.en
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorSchwingenschlögl, Udoen
dc.contributor.authorZhu, Zhiyongen
dc.date.accessioned2014-04-13T14:14:01Z-
dc.date.available2014-04-13T14:14:01Z-
dc.date.issued2010-10-11en
dc.identifier.citationGoker A, Zhu ZY, Manchon A, Schwingenschlögl U (2010) Prediction of femtosecond oscillations in the transient current of a quantum dot in the Kondo regime. Phys Rev B 82. doi:10.1103/PhysRevB.82.161304.en
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.82.161304en
dc.identifier.urihttp://hdl.handle.net/10754/315796en
dc.description.abstractWe invoke the time-dependent noncrossing approximation in order to study the effects of the density of states of gold contacts on the instantaneous conductance of a single electron transistor which is abruptly moved into the Kondo regime by means of a gate voltage. For an asymmetrically coupled system, we observe that the instantaneous conductance in the Kondo time scale exhibits beating with distinct frequencies, which are proportional to the separation between the Fermi level and the sharp features in the density of states of gold. Increasing the ambient temperature or bias quenches the amplitude of the oscillations. We attribute the oscillations to interference between the emerging Kondo resonance and van-Hove singularities in the density of state. In addition, we propose an experimental realization of this model.en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.82.161304en
dc.relation.urlhttp://arxiv.org/abs/1009.5805en
dc.rightsArchived with thanks to Physical Review Ben
dc.titlePrediction of femtosecond oscillations in the transient current of a quantum dot in the Kondo regimeen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentComputational Physics and Materials Science (CPMS)en
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Physics, Bilecik University, 11210, Gulumba, Bilecik, Turkeyen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
dc.identifier.arxividarXiv:1009.5805en
kaust.authorGoker, Alien
kaust.authorZhu, Zhiyongen
kaust.authorManchon, Aurelienen
kaust.authorSchwingenschlögl, Udoen
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