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2015 | 127 | 2 | 198-200
Article title

Signatures of Majorana States in Electron Transport through a Quantum Dot Coupled to a Topological Wire

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Abstracts
EN
We consider theoretically a system composed of a quantum dot coupled to a topological superconducting wire. The dot, being in Coulomb blockade (CB) regime is additionally coupled to the normal leads. The topological wire hosts Majorana states, which, as we show, characteristically modifies conductance through the dot. An unpaired Majorana state in the wire causes a unique temperature dependence of zero bias conductance vs. gate voltage. It decreases in-between CB peaks and on the sides of the peaks from the plateau at ~ e²/2h when temperature increases. At the same time conductance increases at the CB peak positions. It is accompanied by zero bias anomaly in differential conductance. For finite overlap of Majorana states in the wire the zero bias anomaly disappears. Instead, two characteristic Fano resonances of opposite symmetry appear, positioned mirror-symmetrically with respect to zero bias.
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Year
Volume
127
Issue
2
Pages
198-200
Physical description
Dates
published
2015-02
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n2009kz
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