Please wait a minute...
Chin. Phys. B, 2020, Vol. 29(9): 097403    DOI: 10.1088/1674-1056/abaf9c
Special Issue: SPECIAL TOPIC — Topological 2D materials
SPECIAL TOPIC—Topological 2D materials Prev   Next  

Evidence for topological superconductivity: Topological edge states in Bi2Te3/FeTe heterostructure

Bin Guo(郭斌)1, Kai-Ge Shi(师凯歌)1, Hai-Lang Qin(秦海浪)1, Liang Zhou(周良)1, Wei-Qiang Chen(陈伟强)1, Fei Ye(叶飞)1, Jia-Wei Mei(梅佳伟)1, Hong-Tao He(何洪涛)1, Tian-Luo Pan(潘天洛)1, Gan Wang(王干)1,2
1 Shenzhen Institute for Quantum Science and Engineering & Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China;
2 Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Abstract  Majorana fermions have been predicted to exist at the edge states of a two-dimensional topological superconductor. We fabricated single quintuple layer (QL) Bi2Te3/FeTe heterostructure with the step-flow epitaxy method and studied the topological properties of this system by using angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy. We observed the coexistence of robust superconductivity and edge states on the single QL Bi2Te3 islands which can be potential evidence for topological superconductor.
Keywords:  Bi2Te3/FeTe heterostructure      topological superconductivity      edge states      scanning tunnelling microcopy  
Received:  13 April 2020      Revised:  29 May 2020      Accepted manuscript online:  15 August 2020
PACS:  74.55.+v (Tunneling phenomena: single particle tunneling and STM)  
  74.70.Xa (Pnictides and chalcogenides)  
  74.78.-w (Superconducting films and low-dimensional structures)  
  74.78.Fk (Multilayers, superlattices, heterostructures)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61734008 and 11774143), the National Key Research and Development Program of China (Grant Nos. 2018YFA0307100, 2016YFA0301703, and 2016YFA0300300), the Natural Science Foundation of Guangdong Province, China (Grant Nos. 2015A030313840 and 2017A030313033), the State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF201602), Technology and Innovation Commission of Shenzhen Municipality, China (Grant Nos. ZDSYS20170303165926217 and JCYJ20170412152334605), and Guangdong Provincial Key Laboratory, China (Grant No. 2019B121203002). J.-W.M. was partially supported by the Program for Guangdong Introducing Innovative and Entrepreneurial Teams, China (Grant No. 2017ZT07C062).
Corresponding Authors:  Tian-Luo Pan, Gan Wang     E-mail:  wangg@sustech.edu.cn;pantl@sustech.edu.cn

Cite this article: 

Bin Guo(郭斌), Kai-Ge Shi(师凯歌), Hai-Lang Qin(秦海浪), Liang Zhou(周良), Wei-Qiang Chen(陈伟强), Fei Ye(叶飞), Jia-Wei Mei(梅佳伟), Hong-Tao He(何洪涛), Tian-Luo Pan(潘天洛), Gan Wang(王干) Evidence for topological superconductivity: Topological edge states in Bi2Te3/FeTe heterostructure 2020 Chin. Phys. B 29 097403

[1] Nayak C, Simon S H, Stern A, Freedman M and Sarma S D 2008 Rev. Mod. Phys. 80 1083
[2] Hasan M Z and Kane C L 2010 Rev. Mod. Phys. 82 3045
[3] Qi X L and Zhang S C 2011 Rev. Mod. Phys. 83 1057
[4] Chen C, Jiang K, Zhang Y, Liu C, Liu Y, Wang Z and Wang J 2020 Nat. Phys. 16 536
[5] Liu C, Chen C, Liu X, Wang Z, Liu Y, Ye S, Wang Z, Hu J and Wang J 2020 Sci. Adv. 6 eaax7547
[6] Nishio T, Ono M and Eguchi T 2006 Appl. Phys. Lett. 88 113115
[7] Nishio T, An T, Nomura A, Miyachi K, Eguchi T, Sakata H, Lin S, Hayashi N, Nakai N, Machida M and Hasegawa Y 2008 Phys. Rev. Lett. 101 167001
[8] Sun H H, Wang M X, Zhu F, Wang G Y, Ma H Y, Xu Z A, Liao Q, Lu Y, Gao C L, Li Y Y, Liu C, Qian D, Guan D and Jia J F 2017 Nano Lett. 17 3035
[9] Lüpke F, Waters D, Barrera S C, Widom M, Mandrus D G, Yan J, Feenstra R M and Hunt B M 2020 Nat. Phys. 16 526
[10] Wang A Q, Li C Z, Li C, Liao Z M, Brinkman A and Yu D P 2018 Phys. Rev. Lett. 121 237701
[11] Li C Z, Wang A Q, Li C, Zheng W Z, Brinkman A, Yu D P and Liao Z M 2020 Phys. Rev. Lett. 124 156601
[12] Palacio-Morales A, Mascot E, Cocklin S, Kim H, Rachel S, Morr D K and Wiesendanger R 2019 Sci. Adv. 5 eaav6600
[13] Nadj-Perge S, Drozdov I K, Li J, Chen H, Jeon S, Seo J, MacDonald A H, Bernevig B A and Yazdani A 2014 Science 346 602
[14] Ruby M, Heinrich B W, Peng Y, Oppen F and Franke K J 2017 Nano Lett. 17 4473
[15] Mizuguchi Y, Tomioka F, Tsuda S, Yamaguchi T and Takano Y 2009 Appl. Phys. Lett. 94 012503
[16] Li F, Ding H, Tang C, Peng J, Zhang Q, Zhang W, Zhou G, Zhang D, Song C L, He K, Ji S, Chen X, Gu L, Wang L, Ma X C and Xue Q K 2015 Phys. Rev. B 91 220503
[17] Wang G, He Q L, He H T, Liu H C, He M, Wang J N, Lortz R, Wong G K L and Sou I K 2014 Cryst. Growth. 14 3370
[18] He Q L, Liu H, He M, Lai Y H, He H, Wang G, Law K T, Lortz R, Wang J and Sou I K 2014 Nat. Commun. 5 4247
[19] Qin H, Guo B, Wang L, Zhang M, Xu B, Shi K, Pan T, Zhou L, Qiu Y, Xi B, Sou I K, Yu D, Chen W Q, He H, Ye F, Mei J W and Wang G 2020 Nano Lett. 20 3160
[20] Owada K, Nakayama K, Tsubono R, Shigekawa K, Sugawara K, Takahashi T and Sato T 2019 Phys. Rev. B 100 064518
[21] Koma A 1992 Thin Solid Films 216 72
[22] Xia Y, Qian D, Wray L, Hsieh D, Chen G F, Luo J L, Wang N L and Hasan M Z 2009 Phys. Rev. Lett. 103 037002
[23] Liu Z K, He R H, Lu D H, Yi M, Chen Y L, Hashimoto M, Moore R G, Mo S K, Nowadnick E A, Hu J, Liu T J, Mao Z Q, Devereaux T P, Hussain Z and Shen Z X 2013 Phys. Rev. Lett. 110 037003
[24] Li Y Y, Wang G, Zhu X G, Liu M H, Ye C, Chen X, Wang Y Y, He K, Wang L L, Ma X C, Zhang H J, Dai X, Fang Z, Xie X C, Liu Y, Qi X L, Jia J F, Zhang S C and Xue Q K 2010 Adv. Mater. 22 4002
[25] Chen X, Chen M, Duan W, Yang H and Wen H H 2019 arXiv:1905.05735
[1] Enhanced topological superconductivity in an asymmetrical planar Josephson junction
Erhu Zhang(张二虎) and Yu Zhang(张钰). Chin. Phys. B, 2023, 32(4): 040307.
[2] Quantum transport signatures of non-trivial topological edge states in a ring-shaped Su-Schrieffer-Heeger double-chain system
Cheng-Zhi Ye(叶成芝), Lan-Yun Zhang(张蓝云), and Hai-Bin Xue(薛海斌). Chin. Phys. B, 2022, 31(2): 027304.
[3] Change-over switch for quantum states transfer with topological channels in a circuit-QED lattice
Liu-Yong Cheng(程留永), Li-Na Zheng(郑黎娜), Ruixiang Wu(吴瑞祥), Hong-Fu Wang(王洪福), and Shou Zhang(张寿). Chin. Phys. B, 2022, 31(2): 020305.
[4] Topological photonic states in gyromagnetic photonic crystals: Physics, properties, and applications
Jianfeng Chen(陈剑锋) and Zhi-Yuan Li(李志远). Chin. Phys. B, 2022, 31(11): 114207.
[5] Efficient and stable wireless power transfer based on the non-Hermitian physics
Chao Zeng(曾超), Zhiwei Guo(郭志伟), Kejia Zhu(祝可嘉), Caifu Fan(范才富), Guo Li(李果), Jun Jiang(江俊), Yunhui Li(李云辉), Haitao Jiang(江海涛), Yaping Yang(羊亚平), Yong Sun(孙勇), and Hong Chen(陈鸿). Chin. Phys. B, 2022, 31(1): 010307.
[6] Floquet bands and photon-induced topological edge states of graphene nanoribbons
Weijie Wang(王威杰), Xiaolong Lü(吕小龙), and Hang Xie(谢航). Chin. Phys. B, 2021, 30(6): 066701.
[7] Quantum dynamics on a lossy non-Hermitian lattice
Li Wang(王利), Qing Liu(刘青), and Yunbo Zhang(张云波). Chin. Phys. B, 2021, 30(2): 020506.
[8] Erratum to “Floquet bands and photon-induced topological edge states of graphene nanoribbons”
Weijie Wang(王威杰), Xiaolong Lü(吕小龙), and Hang Xie(谢航). Chin. Phys. B, 2021, 30(11): 119901.
[9] High winding number of topological phase in non-unitary periodic quantum walk
Yali Jia(贾雅利) and Zhi-Jian Li(李志坚). Chin. Phys. B, 2021, 30(10): 100301.
[10] Edge states enhanced by long-range hopping: An analytical study
Huiping Wang(王会平), Li Ren(任莉), Liguo Qin(秦立国), and Yueyin Qiu(邱岳寅). Chin. Phys. B, 2021, 30(10): 107301.
[11] A simple tight-binding approach to topological superconductivity in monolayer MoS2
H Simchi. Chin. Phys. B, 2020, 29(2): 027401.
[12] Symmetry-controlled edge states in graphene-like topological sonic crystal
Zhang-Zhao Yang(杨彰昭), Jin-Heng Chen(陈晋恒), Yao-Yin Peng(彭尧吟), and Xin-Ye Zou(邹欣晔)†. Chin. Phys. B, 2020, 29(10): 104302.
[13] Neutral excitation and bulk gap of fractional quantum Hall liquids in disk geometry
Wu-Qing Yang(杨武庆), Qi Li(李骐), Lin-Peng Yang(杨林鹏), Zi-Xiang Hu(胡自翔). Chin. Phys. B, 2019, 28(6): 067303.
[14] Topological edge states and electronic structures of a 2D topological insulator: Single-bilayer Bi (111)
Gao Chun-Lei (高春雷), Qian Dong (钱冬), Liu Can-Hua (刘灿华), Jia Jin-Feng (贾金锋), Liu Feng (刘锋). Chin. Phys. B, 2013, 22(6): 067304.
No Suggested Reading articles found!