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arXiv · 1201.6470

Universal lineshape of the Kondo zero-bias anomaly in a quantum dot

Andrey V. Kretinin·Hadas Shtrikman·Diana Mahalu
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Abstract

Encouraged by the recent real-time renormalization group results we carried out a detailed analysis of the nonequilibrium Kondo conductance observed in an InAs nanowire-based quantum dot and found them to be in excellent agreement. We show that in a wide range of bias the Kondo conductance zero-bias anomaly is scaled by the Kondo temperature to a universal lineshape predicted by the numerical study. The lineshape can be approximated by a phenomenological expression of a single argument $eV_{sd}=k_{\rm B}T_{\rm K}$. The knowledge of an analytical expression for the lineshape provides an alternative way for estimation of the Kondo temperature in a real experiment, with no need for time consuming temperature dependence measurements of the linear conductance.

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Andrey V. Kretinin, Hadas Shtrikman, Diana Mahalu. 2012-01-31. Universal lineshape of the Kondo zero-bias anomaly in a quantum dot. https://doi.org/10.1103/physrevb.85.201301

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