Kondo-like zero-bias conductance anomaly in a three-dimensional topological insulator nanowire

2015/10/07 by Sungjae Cho, Ruidan Zhong, Cho, Sungjae +7 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall

paper · pdf · doi:10.48550/arxiv.1510.01855

arxiv created 2015/10/07 · arxiv updated 2015/10/08

Abstract

Zero bias anomalies in topological nanowires have recently captured significant attention, as they are possible signatures of Majorana modes. Yet there are many other possible origins of zero bias peaks in nanowires, for example, weak localization, Andreev bound states, or the Kondo effect. Here, we discuss observations of differential conductance peaks at zero bias voltage in nonsuperconducting electronic transport through a 3D topological insulator nanowire. The zero bias conductance peaks show logarithmic temperature dependence and often linear splitting with magnetic fields, both of which are signatures of the Kondo effect in quantum dots. Here, we characterize the zero bias peaks and discuss their origin.

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