Instituto de Ciencia de Materiales de Madrid
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Transport, shot noise, and topology in ac-driven dimer arrays

Michael Niklas, Mónica Benito, Sigmund Kohler, and Gloria Platero
Nanotechnology 27, 454002 (2016)

We analyze an AC-driven dimer chain connected to a strongly biased electron source and drain. It turns out that the resulting transport exhibits fingerprints of topology. They are particularly visible in the driving-induced current suppression and the Fano factor. Thus, shot noise measurements provide a topological phase diagram as a function of the driving parameters. The observed phenomena can be explained physically by a mapping to an effective time-independent Hamiltonian and the emergence of edge states. Moreover, by considering quantum dissipation, we determine the requirements for the coherence properties in a possible experimental realization. For the computation of the zero-frequency noise, we develop an efficient method based on matrix-continued fractions.
arXiv:1607.00203 [cond-mat]

[ICMM-CSIC] [Condensed Matter Theory]
last modified: 7.11.2017 by Sigmund Kohler