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arXiv · 1104.5148

Non-equilibrium transport through quantum dots with Dzyaloshinsky--Moriya--Kondo interaction

Mikhail Pletyukhov·Dirk Schuricht
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Abstract

We study non-equilibrium transport through a single-orbital Anderson model in a magnetic field with spin-dependent hopping amplitudes. In the cotunneling regime it is described by an effective spin-1/2 dot with a Dzyaloshinsky--Moriya--Kondo (DMK) interaction between the spin on the dot and the electron spins in the leads. Using a real-time renormalization group technique we show that at low temperatures (i) the DMK interaction is strongly renormalized, (ii) the renormalized magnetic field acquires a linear voltage dependence, and (iii) the differential conductance exhibits a voltage asymmetry which is strongly enhanced by logarithmic corrections. We propose transport measurements in which these signatures can be observed.

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Mikhail Pletyukhov, Dirk Schuricht. 2011-07-29. Non-equilibrium transport through quantum dots with Dzyaloshinsky--Moriya--Kondo interaction. https://doi.org/10.1103/physrevb.84.041309

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