Experimental evidences of topological surface states of β-Ag2Te
We present evidence of topological surface states in β-Ag2Te 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...
| Main Authors: | , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/95712 http://hdl.handle.net/10220/10063 |
| _version_ | 1826115514183712768 |
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| author | Zhu, Weiguang Sulaev, Azat Ren, Peng Xia, Bin Lin, Qing Hua Yu, Ting Qiu, Caiyu Zhang, Shuang-Yuan Han, Ming-Yong Li, Zhi Peng Wu, Qingyu Feng, Yuan Ping Shen, Lei Shen, Shun-Qing Wang, Lan |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhu, Weiguang Sulaev, Azat Ren, Peng Xia, Bin Lin, Qing Hua Yu, Ting Qiu, Caiyu Zhang, Shuang-Yuan Han, Ming-Yong Li, Zhi Peng Wu, Qingyu Feng, Yuan Ping Shen, Lei Shen, Shun-Qing Wang, Lan |
| author_sort | Zhu, Weiguang |
| collection | NTU |
| description | We present evidence of topological surface states in β-Ag2Te 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. |
| first_indexed | 2024-10-01T03:56:24Z |
| format | Journal Article |
| id | ntu-10356/95712 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:56:24Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/957122023-02-28T19:39:35Z Experimental evidences of topological surface states of β-Ag2Te Zhu, Weiguang Sulaev, Azat Ren, Peng Xia, Bin Lin, Qing Hua Yu, Ting Qiu, Caiyu Zhang, Shuang-Yuan Han, Ming-Yong Li, Zhi Peng Wu, Qingyu Feng, Yuan Ping Shen, Lei Shen, Shun-Qing Wang, Lan School of Physical and Mathematical Sciences DRNTU::Science::Mathematics::Topology We present evidence of topological surface states in β-Ag2Te 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. Published version 2013-06-05T06:48:57Z 2019-12-06T19:20:14Z 2013-06-05T06:48:57Z 2019-12-06T19:20:14Z 2013 2013 Journal Article Sulaev, A., Ren, P., Xia, B., Lin, Q. H., Yu, T., Qiu, C., et al. (2013). Experimental evidences of topological surface states of β-Ag2Te. AIP Advances, 3(3). https://hdl.handle.net/10356/95712 http://hdl.handle.net/10220/10063 10.1063/1.4795735 en AIP advances © 2013 Author(s). This paper was published in AIP Advances and is made available as an electronic reprint (preprint) with permission of Author(s). The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4795735]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Mathematics::Topology Zhu, Weiguang Sulaev, Azat Ren, Peng Xia, Bin Lin, Qing Hua Yu, Ting Qiu, Caiyu Zhang, Shuang-Yuan Han, Ming-Yong Li, Zhi Peng Wu, Qingyu Feng, Yuan Ping Shen, Lei Shen, Shun-Qing Wang, Lan Experimental evidences of topological surface states of β-Ag2Te |
| title | Experimental evidences of topological surface states of β-Ag2Te |
| title_full | Experimental evidences of topological surface states of β-Ag2Te |
| title_fullStr | Experimental evidences of topological surface states of β-Ag2Te |
| title_full_unstemmed | Experimental evidences of topological surface states of β-Ag2Te |
| title_short | Experimental evidences of topological surface states of β-Ag2Te |
| title_sort | experimental evidences of topological surface states of β ag2te |
| topic | DRNTU::Science::Mathematics::Topology |
| url | https://hdl.handle.net/10356/95712 http://hdl.handle.net/10220/10063 |
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