Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 103: Transport: Poster Session
TT 103.53: Poster
Donnerstag, 19. März 2015, 15:00–18:00, Poster B
Time-dependent factorial cumulants in quantum dots coupled to ferromagnetic leads — •Philipp Stegmann1, Björn Sothmann2, and Jürgen König1 — 1Theoretische Physik, Universität Duisburg-Essen and CENIDE, 47048 Duisburg, Germany — 2Départment de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland
Recently, theoretical studies have shown that factorial cumulants provide a useful tool to probe interaction in electronic transport through nanostructures [1,2]. Sign changes of factorial cumulants as function of time indicate interaction, whereas in the absence of such sign changes the system can be described by an (effective) noninteracting Hamiltonian. We demonstrate this behavior for a quantum dot and for a mesoscopic Stoner particle [3] weakly tunnel coupled to two ferromagnetic leads.
[1] D. Kambly, C. Flindt, and M. Büttiker,
Phys. Rev. B 83, 075432 (2011).
[2] D. Kambly and C. Flindt, J. Comput. Electron. 12, 331 (2013).
[3] B. Sothmann, J. König, and Y. Gefen,
Phys. Rev. Lett. 108, 166603 (2012).