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Bi2Te3拓扑绝缘体表面颗粒化铅膜诱导的超导邻近效应

丁玥 沈洁 庞远 刘广同 樊洁 姬忠庆 杨昌黎 吕力

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Bi2Te3拓扑绝缘体表面颗粒化铅膜诱导的超导邻近效应

丁玥, 沈洁, 庞远, 刘广同, 樊洁, 姬忠庆, 杨昌黎, 吕力

Proximity-effect-induced superconductivity by granular Pb film on the surface of Bi2Te3 topological insulator

Ding Yue, Shen Jie, Pang Yuan, Liu Guang-Tong, Fan Jie, Ji Zhong-Qing, Yang Chang-Li, Lü Li
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  • 拓扑绝缘体的出现为寻找拓扑超导体和Majorana费米子提供了一种可能的途径. 在拓扑绝缘体Bi2Te3表面沉积极薄的不连续铅膜, 试图通过邻近效应感应出大片的超导区, 为下一步研究拓扑超导电性创造条件.借助四引线电输运测量实验, 在0.25 K的低温下看到了超流现象, 表明沉积在Bi2Te3表面的厚度小于20 nm的颗粒化铅膜能够诱导邻近效应, 并且使大片Bi2Te3超导.
    The appearance of topological insulators provides us with a chance of finding topological superconductors and Majorana fermions. To pursue these findings one might need to induce large areas of proximity superconductivity on the surface of Bi2Te3 by depositing granular and discrete Pb film. In this experiment, a superconducting state over a distance of 9.5 rm is observed below 0.25 K on a Bi2Te3 crystal whose surface is deposited with Pb grains with a thickness of less than 20 nm and separated at a distance of 20-30 nm.
    • 基金项目: 国家重点基础研究发展计划(批准号: 2009CB929101, 2011CB921702);国家自然科学基金(批准号: 91221203, 11174340, 11174357)和中国科学院知识创新工程项目资助的课题.
    • Funds: Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929101, 2011CB921702), the National Natural Science Foundation of China (Grant Nos. 91221203, 11174340, 11174357), and the Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences.
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    Meissner H 1960 Phys. Rev. 117 672

    [2]

    Pannetier B, Courtois H 2000 J. Low Temp. Phys. 118 599

    [3]

    Golubov A A, Kupriyanov M Y, Il’ichev E 2004 Rev. Mod. Phys. 76 411

    [4]

    Nguyen C, Werking J, Kroemer H, Hu E L 1990 Appl. Phys. Lett. 57 87

    [5]

    Heersche H B, Jarillo-Herrero P, Oostinga J B, Vandersypen L M K, Morpurgo A F 2007 Nature 446 56

    [6]

    Wang J, Shi C T, Tian M L, Zhang Q, Kumar N, Jain J K, Mallouk T E, Chan M H W 2009 Phys. Rev. Lett. 102 247003

    [7]

    Wang J, Singh M, Tian M L, Kumar N, Liu B Z, Shi C T, Jain J K, Samarth N, Mallouk T E, Chan M H W 2010 Nat. Phys. 6 389

    [8]

    Moore J E 2010 Nature 464 194

    [9]

    Qi X L, Zhang S C 2011 Rev. Mod. Phys. 83 1057

    [10]

    Hasan M Z, Kane C L 2010 Rev. Mod. Phys. 82 3045

    [11]

    Zhang H J, Liu C X, Qi X L, Dai X, Fang Z, Zhang S C 2009 Nat. Phys. 5 438

    [12]

    Xia Y, Qian D, Hsieh D, Wray L, Pal A, Lin H, Bansil A, Grauer D, Hor Y S, Cava R J, Hasan M Z 2009 Nat. Phys. 5 398

    [13]

    Chen Y L, Analytis J G, Chu J H, Liu Z K, Mo S K, Qi X L, Zhang H J, Lu D H, Dai X, Fang Z, Zhang S C, Fisher I R, Hussain Z, Shen Z X 2009 Science 325 178

    [14]

    Fu L and Kane C L 2008 Phys. Rev. Lett. 100 096407

    [15]

    Fu L and Kane C L 2009 Phys. Rev. Lett. 102 216403

    [16]

    Tanaka Y, Yokoyama T, Nagaosa N 2009 Phys. Rev. Lett. 103 107002

    [17]

    Law K T, Lee P A, Ng T K 2009 Phys. Rev. Lett. 103 237001

    [18]

    Ou Y X, Singh M, Wang J 2012 Sci. China-Phys. Mech. Astron. 55 2226

    [19]

    Kasumov A Y, Kononenko O V, Matveev V N, Borsenko T B, Tulin V A, Vdovin E E, Khodos I I 1996 Phys. Rev. Lett. 77 3029

    [20]

    Sacépé B, Oostinga J B, Li J, Ubaldini A, Couto N J G, Giannini E, Morpurgo A F 2011 Nat. Commun. 2 575

    [21]

    Zhang D, Wang J, DaSilva A M, Lee J S, Gutierrez H R, Chan M H W, Jain J, Samarth N 2011 Phys. Rev. B 84 165120

    [22]

    Wang J, Chang C Z, Li H D, He K, Zhang D, Singh M, Ma X C, Samarth N, Xie M H, Xue Q K, Chan M H W 2012 Phys. Rev. B 85 045415

    [23]

    Veldhorst M, Snelder M, Hoek M, Gang T, Guduru V K, Wang X L, Zeitler U, Wiel W G V D, Golubov A A, Hilgenkamp H 2012 Nat. Mat. 11 417

    [24]

    Williams J R, Bestwick A J, Gallagher P, Hong S S, Cui Y, Bleich A S, Analytis J G, Fisher I R, Goldhaber-Gordon D 2012 Phys. Rev. Lett. 109 056803

    [25]

    Qu F M, Yang F, Shen J, Ding Y, Chen J, Ji Z Q, Liu G T, Fan J, Jing X N, Yang C L, Lu L 2012 Sci. Rep. 2 339

    [26]

    He H T, Li B K, Liu H C, Guo X, Wang Z Y, Xie M H, Wang J N 2012 Appl. Phys. Lett. 100 032105

    [27]

    Tinkham M 1996 Introduction to Superconductivity (New York: McGraw-Hill, Inc.) p131

    [28]

    De Gennes P G 1964 Rev. Mod. Phys. 36 225

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出版历程
  • 收稿日期:  2013-04-23
  • 修回日期:  2013-05-09
  • 刊出日期:  2013-08-05

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