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Experimental evidences of topological surface states of β-Ag2Te

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Experimental evidences of topological surface states of β-Ag2Te
นักวิจัย : Sulaev, Azat , Ren, Peng , Xia, Bin , Lin, Qing Hua , Yu, Ting , Qiu, Caiyu , Zhang, Shuang-Yuan , Han, Ming-Yong , Li, Zhi Peng , Zhu, Wei Guang , Wu, Qingyu , Feng, Yuan Ping , Shen, Lei , Shen, Shun-Qing , Wang, Lan
คำค้น : DRNTU::Science::Mathematics::Topology.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : 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). , http://hdl.handle.net/10220/10063 , http://dx.doi.org/10.1063/1.4795735
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : AIP advances
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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.

บรรณานุกรม :
Sulaev, Azat , Ren, Peng , Xia, Bin , Lin, Qing Hua , Yu, Ting , Qiu, Caiyu , Zhang, Shuang-Yuan , Han, Ming-Yong , Li, Zhi Peng , Zhu, Wei Guang , Wu, Qingyu , Feng, Yuan Ping , Shen, Lei , Shen, Shun-Qing , Wang, Lan . (2556). Experimental evidences of topological surface states of β-Ag2Te.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Sulaev, Azat , Ren, Peng , Xia, Bin , Lin, Qing Hua , Yu, Ting , Qiu, Caiyu , Zhang, Shuang-Yuan , Han, Ming-Yong , Li, Zhi Peng , Zhu, Wei Guang , Wu, Qingyu , Feng, Yuan Ping , Shen, Lei , Shen, Shun-Qing , Wang, Lan . 2556. "Experimental evidences of topological surface states of β-Ag2Te".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Sulaev, Azat , Ren, Peng , Xia, Bin , Lin, Qing Hua , Yu, Ting , Qiu, Caiyu , Zhang, Shuang-Yuan , Han, Ming-Yong , Li, Zhi Peng , Zhu, Wei Guang , Wu, Qingyu , Feng, Yuan Ping , Shen, Lei , Shen, Shun-Qing , Wang, Lan . "Experimental evidences of topological surface states of β-Ag2Te."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Sulaev, Azat , Ren, Peng , Xia, Bin , Lin, Qing Hua , Yu, Ting , Qiu, Caiyu , Zhang, Shuang-Yuan , Han, Ming-Yong , Li, Zhi Peng , Zhu, Wei Guang , Wu, Qingyu , Feng, Yuan Ping , Shen, Lei , Shen, Shun-Qing , Wang, Lan . Experimental evidences of topological surface states of β-Ag2Te. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.