Magnetotransport properties of Cd3As2 nanostructures

Zhang, Enze and Liu, Yanwen and Wang, Weiyi and Zhang, Cheng and Zhou, Peng and Chen, Zhi Gang and Zou, Jin and Xiu, Faxian (2015) Magnetotransport properties of Cd3As2 nanostructures. ACS Nano, 9 (9). pp. 8843-8850. ISSN 1936-0851

Abstract

Three-dimensional (3D) topological Dirac semimetal has a linear energy dispersion in 3D momentum space, and it can be viewed as an analogue of graphene. Extensive efforts have been devoted to the understanding of bulk materials, but yet it remains a challenge to explore the intriguing physics in low-dimensional Dirac semimetals. Here, we report on the synthesis of Cd3As2 nanowires and nanobelts and a systematic investigation of their magnetotransport properties. Temperature-dependent ambipolar behavior is evidently demonstrated, suggesting the presence of finite-size of bandgap in nanowires. Cd3As2 nanobelts, however, exhibit metallic characteristics with a high carrier mobility exceeding 32 000 cm2 V-1 s-1 and pronounced anomalous double-period Shubnikov-de Haas (SdH) oscillations. Unlike the bulk counterpart, the Cd3As2 nanobelts reveal the possibility of unusual change of the Fermi sphere owing to the suppression of the dimensionality. More importantly, their SdH oscillations can be effectively tuned by the gate voltage. The successful synthesis of Cd3As2 nanostructures and their rich physics open up exciting nanoelectronic applications of 3D Dirac semimetals.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 21 Jun 2017 03:49
Last Modified: 21 Jun 2017 03:49
Uncontrolled Keywords: ambipolar effect; gate tunability; nanobelt; nanowire; Shubnikov-de Haas oscillations; ambipolar; high carrier mobility; magneto transport properties; nanoelectronic applications; Shubnikov de-Haas oscillation; shubnikov-de-haas oscillations; threedimensional (3-d); tunabilities;
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970112 Expanding Knowledge in Built Environment and Design
Identification Number or DOI: 10.1021/acsnano.5b02243
URI: http://eprints.usq.edu.au/id/eprint/31677

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