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arXiv · 2008.07399

STM as a single Majorana detector of Kitaev's chiral spin liquid

Masafumi Udagawa·Shintaro Takayoshi·Takashi Oka
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Abstract

In this letter, we propose a local detection scheme for the Majorana zero mode (MZM) carried by a vison in Kitaev's chiral spin liquid (CSL) using scanning tunneling microscopy (STM). The STM introduces a single Majorana into the system through hole/charge injection and the Majorana interacts with the MZM to form a stable composite object. We derive the exact analytical expression of single-hole Green's function in the Mott insulating limit of Kitaev's model and show that the differential conductance has split peaks, as a consequence of resonant tunneling through the vison-hole composite. The peak splitting scales with the binding energy of vison-hole composite, which is comparable to the Majorana gap in CSL, well within the reach of experimental observation.

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Masafumi Udagawa, Shintaro Takayoshi, Takashi Oka. 2020-08-17. STM as a single Majorana detector of Kitaev's chiral spin liquid. https://doi.org/10.1103/physrevlett.126.127201

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