journal article·2018-01-23

Piezotronic Transistor Based on Topological Insulators

Gongwei Hu, Yan Zhang, Lijie Li, Zhong Lin Wang

ACS Nano· Volume 12· Issue 1
Publisher page

Abstract

Piezotronics and piezophototronics are emerging fields by coupling piezoelectric, semiconductor, and photon excitation effects for achieving high-performance strain-gated sensors, LEDs, and solar cells. The built-in piezoelectric potential effectively controls carrier transport characteristics in piezoelectric semiconductor materials, such as ZnO, GaN, InN, CdS, and monolayer MoS 2 . In this paper, a topological insulator piezotronic transistor is investigated theoretically based on a HgTe/CdTe quantum well. The conductance, ON/OFF ratio, and density of states have been studied at various strains for the topological insulator piezotronic transistor. The ON/OFF ratio of conductance can reach up to 10 10 with applied strain. The properties of the topological insulator are modulated by piezoelectric potential, which is the result of the piezotronic effect on quantum states. The principle provides a method for developing high-performance piezotronic devices based on a topological insulator.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Advanced Memory and Neural Computing · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China

Multidisciplinary Nanotechnology Centre, College of Engineering, Swansea University, Swansea, SA1 8EN, U.K.

School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States

Funding

European Commission · Swansea University · University of Electronic Science and Technology of China · Innovate UK · Solar Photovoltaic Academic Research Consortium · Thousands Talents Program for Pioneer Researcher and his Innovation Team · Welsh Government

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