journal article·2013-07-01Open access

Molecular beam epitaxial growth of Bi2Te3 and Sb2Te3 topological insulators on GaAs (111) substrates: a potential route to fabricate topological insulator p-n junction

Zhaoquan Zeng, Timothy A. Morgan, Dongsheng Fan, Chen Li, Yusuke Hirono, Xian Hu, Yanfei Zhao, Joon Sue Lee, Jian Wang, Zhiming M. Wang, Shuiqing Yu, Michael E. Hawkridge, Mourad Benamara, Gregory J. Salamo

AIP Advances· Volume 3· Issue 7

Abstract

High quality Bi2Te3 and Sb2Te3 topological insulators films were epitaxially grown on GaAs (111) substrate using solid source molecular beam epitaxy. Their growth and behavior on both vicinal and non-vicinal GaAs (111) substrates were investigated by reflection high-energy electron diffraction, atomic force microscopy, X-ray diffraction, and high resolution transmission electron microscopy. It is found that non-vicinal GaAs (111) substrate is better than a vicinal substrate to provide high quality Bi2Te3 and Sb2Te3 films. Hall and magnetoresistance measurements indicate that p type Sb2Te3 and n type Bi2Te3 topological insulator films can be directly grown on a GaAs (111) substrate, which may pave a way to fabricate topological insulator p-n junction on the same substrate, compatible with the fabrication process of present semiconductor optoelectronic devices.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Graphene research and applications · Electronic and Structural Properties of Oxides

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

Affiliations

University of Arkansas 1 Arkansas Institute for Nanoscale Material Sciences and Engineering, , Fayetteville, AR 72701, USA

University of Arkansas 2 Department of Electrical Engineering, , Fayetteville, AR 72701, USA

Peking University 3 International Center for Quantum Materials, School of Physics, , Beijing, 100871, China

The Pennsylvania State University 4 The Center for Nanoscale Science and Department of Physics, , University Park, PA 16802, USA

University of Electronic Science and Technology of China 5 State Key Laboratory of Electronic Thin Films and Integrated Devices, , Chengdu 610054, China

Chinese Academy of Science 6 Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, , Beijing 100083, China

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