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https://doi.org/10.1063/1.4795735
Title: | Experimental evidences of topological surface states of β-Ag 2Te | Authors: | Sulaev, A. Ren, P. Xia, B. Lin, Q.H. Yu, T. Qiu, C. Zhang, S.-Y. Han, M.-Y. Li, Z.P. Zhu, W.G. Wu, Q. Feng, Y.P. Shen, L. Shen, S.-Q. Wang, L. |
Issue Date: | 2013 | Citation: | Sulaev, A., Ren, P., Xia, B., Lin, Q.H., Yu, T., Qiu, C., Zhang, S.-Y., Han, M.-Y., Li, Z.P., Zhu, W.G., Wu, Q., Feng, Y.P., Shen, L., Shen, S.-Q., Wang, L. (2013). Experimental evidences of topological surface states of β-Ag 2Te. AIP Advances 3 (3) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4795735 | Abstract: | We present evidence of topological surface states in β-Ag 2Te through first-principles calculations, periodic quantum interference effect and ambipolar electric field effect in single crystalline nanoribbon. Our first-principles calculations show that β-Ag2Te is a topological insulator with a gapless Dirac cone with strong anisotropy. To experimentally probe the topological surface state, we synthesized high quality β-Ag2Te nanoribbons and performed electron transport measurements. The coexistence of pronounced Aharonov-Bohm oscillations and weak Altshuler-Aronov-Spivak oscillations clearly demonstrates coherent electron transport around the perimeter of β-Ag2Te nanoribbon and therefore the existence of topological surface states, which is further supported by the ambipolar electric field effect for devices fabricated by β-Ag2Te nanoribbons. The experimental evidences of topological surface states and the theoretically predicted anisotropic Dirac cone of β-Ag2Te suggest that the material may be a promising candidate of topological insulator for fundamental study and future spintronic devices. © 2013 Copyright 2013 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. | Source Title: | AIP Advances | URI: | http://scholarbank.nus.edu.sg/handle/10635/96556 | ISSN: | 21583226 | DOI: | 10.1063/1.4795735 |
Appears in Collections: | Staff Publications |
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