Atomic-scale manipulation of single-polaron in a two-dimensional semiconductor

Huiru Liu, Aolei Wang, Ping Zhang, Chen Ma, Caiyun Chen, Zijia Liu, Yi-Qi Zhang, Baojie Feng, Peng Cheng, Jin Zhao (), Lan Chen () and Kehui Wu ()
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Huiru Liu: Chinese Academy of Sciences
Aolei Wang: University of Science and Technology of China
Ping Zhang: Chinese Academy of Sciences
Chen Ma: Chinese Academy of Sciences
Caiyun Chen: Chinese Academy of Sciences
Zijia Liu: Chinese Academy of Sciences
Yi-Qi Zhang: Chinese Academy of Sciences
Baojie Feng: Chinese Academy of Sciences
Peng Cheng: Chinese Academy of Sciences
Jin Zhao: University of Science and Technology of China
Lan Chen: Chinese Academy of Sciences
Kehui Wu: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Polaron is a composite quasiparticle derived from an excess carrier trapped by local lattice distortion, and it has been studied extensively for decades both theoretically and experimentally. However, atomic-scale creation and manipulation of single-polarons in real space have still not been achieved so far, which precludes the atomistic understanding of the properties of polarons as well as their applications. Herein, using scanning tunneling microscopy, we succeeded to create single polarons in a monolayer two-dimensional (2D) semiconductor, CoCl2. Combined with first-principles calculations, two stable polaron configurations, centered at atop and hollow sites, respectively, have been revealed. Remarkably, a series of manipulation progresses — from creation, erasure, to transition — can be accurately implemented on individual polarons. Our results pave the way to understand the physics of polaron at atomic level, and the easy control of single polarons in 2D semiconductor may open the door to 2D polaronics including the data storage.

Date: 2023
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DOI: 10.1038/s41467-023-39361-0

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