PL EN


Preferences help
enabled [disable] Abstract
Number of results
2015 | 127 | 2 | 460-462
Article title

Current Suppression in Transport Through Triple Quantum Dots Coupled to Ferromagnetic Leads

Content
Title variants
Languages of publication
EN
Abstracts
EN
We consider transport through triple quantum dot system in a triangular geometry weakly coupled to external ferromagnetic leads. The real-time diagrammatic technique in the lowest order perturbation theory is used to calculate the current and Fano factor in the parallel and antiparallel magnetic configuration of the system as well as the resulting tunnel magnetoresistance (TMR). We focus on the transport regime where the current is suppressed and show that it can lead to negative differential conductance and large super-Poissonian shot noise, which are present in both magnetic configurations. Furthermore, we show that for voltages where the system is trapped in a one-particle dark state the TMR becomes suppressed, while for two-particle blockade, the TMR is much enhanced.
Keywords
EN
Contributors
  • Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
  • Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
References
  • [1] L.P. Kouwenhoven, D.G. Austing, S. Tarucha, Rep. Prog. Phys. 64, 701 (2001), doi: 10.1088/0034-4885/64/6/201
  • [2] C. Emary, Phys. Rev. B 76, 245319 (2007), doi: 10.1103/PhysRevB.76.245319
  • [3] C. Poltl, C. Emary, T. Brandes, Phys. Rev. B 80, 115313 (2009), doi: 10.1103/PhysRevB.80.115313
  • [4] T. Kostyrko, B.R. Bułka, Phys. Rev. B 79, 075310 (2009), doi: 10.1103/PhysRevB.79.075310
  • [5] I. Weymann, B. R. Bułka, J. Barnaś, Phys. Rev. B 83, 195302 (2011), doi: 10.1103/PhysRevB.83.195302
  • [6] I. Weymann, J. König, J. Martinek, J. Barnaś, G. Schön, Phys. Rev. B 72, 115334 (2005), doi: 10.1103/PhysRevB.72.115334
  • [7] J. Barnaś, I. Weymann, J. Phys.: Condens. Matter 20, 423202 (2008), doi: 10.1088/0953-8984/20/42/423202
  • [8] H. Schoeller, G. Schön, Phys. Rev. B 50, 18436 (1994), doi: 10.1103/PhysRevB.50.18436
  • [8a] J. König, J. Schmid, H. Schoeller, G. Schön, Phys. Rev. B 54, 16820 (1996), doi: 10.1103/PhysRevB.54.16820
  • [9] A. Thielmann, M. H. Hettler, J. König, G. Schön, Phys. Rev. Lett. 95, 146806 (2005), doi: 10.1103/PhysRevLett.95.146806
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n2097kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.