Abstract
We propose a setup consisting of a double-stranded DNA (dsDNA) with s-wave superconductor which can be used to investigate the topological properties. Based on the transport calculations, we find that Majorana zero modes (MZMs) can be formed at the end of dsDNA with a Zeeman field paralleling to the helix direction. A novel nontrivial topological phase can be induced by a gate field. The MZMs in the topological superconducting dsDNA are stable when the weak Anderson disorder is considered. With the assistance of Green's function method, we calculated the differential conductance through the dsDNA with MZMs and proposed an effective method for probing MZM in dsDNA.
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