Scanning Tunneling Microscopy as a Single Majorana Detector of Kitaev's Chiral Spin Liquid

被引：33

作者：

Udagawa, Masafumi ^{[1
,2
]}

Takayoshi, Shintaro ^{[2
,3
]}

Oka, Takashi ^{[2
,4
,5
]}

机构：

[1] Gakushuin Univ, Dept Phys, Toshima Ku, Tokyo 1718588, Japan

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[3] Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan

[4] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[5] Univ Tokyo, Transscale Quantum Sci Inst, Bunkyo Ku, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 12期

关键词：

QUANTUM; STATES; FERMIONS; ANYONS;

D O I：

10.1103/PhysRevLett.126.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 turns out comparable to the Majorana gap in CSL, well within the reach of experimental observation.

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页数：6

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