Giant enhancement of superconductivity in few layers MoTe2

doi:10.1088/1674-1056/ab457f

中国物理B ›› 2019, Vol. 28 ›› Issue (11): 117401-117401.doi: 10.1088/1674-1056/ab457f

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Giant enhancement of superconductivity in few layers MoTe₂

Yuan Gan(甘远), Chang-Woo Cho, Alei Li(李阿蕾), Jian Lyu(吕坚), Xu Du(杜序), Jin-Sheng Wen(温锦生), Li-Yuan Zhang(张立源)

1 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
2 Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China;
3 Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA

收稿日期:2019-05-13 修回日期:2019-09-12 出版日期:2019-11-05 发布日期:2019-11-05
通讯作者: Li-Yuan Zhang E-mail:zhangly@sustech.edu.cn
基金资助:
Project supported by the Guangdong Innovative and Entrepreneurial Research Team Program, China (Grant No. 2016ZT06D348), the National Natural Science Foundation of China (Grant No. 11874193), and the Shenzhen Fundamental Subject Research Program, China (Grant Nos. JCYJ20170817110751776 and JCYJ20170307105434022).

Giant enhancement of superconductivity in few layers MoTe₂

Yuan Gan(甘远)^1,2, Chang-Woo Cho², Alei Li(李阿蕾)², Jian Lyu(吕坚)², Xu Du(杜序)³, Jin-Sheng Wen(温锦生)¹, Li-Yuan Zhang(张立源)²

1 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
2 Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China;
3 Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA

Received:2019-05-13 Revised:2019-09-12 Online:2019-11-05 Published:2019-11-05
Contact: Li-Yuan Zhang E-mail:zhangly@sustech.edu.cn
Supported by:
Project supported by the Guangdong Innovative and Entrepreneurial Research Team Program, China (Grant No. 2016ZT06D348), the National Natural Science Foundation of China (Grant No. 11874193), and the Shenzhen Fundamental Subject Research Program, China (Grant Nos. JCYJ20170817110751776 and JCYJ20170307105434022).

摘要/Abstract

摘要： Recently, the layered transition metal dichalcogenide 1T' MoTe₂ has attracted considerable attention due to its non-saturating magnetoresistance, type-II Weyl semimetal properties, superconductivity, and potential candidate for two-dimensional (2D) topological insulator in the single-and few-layer limit. Here in this work, we perform systematic transport measurements on thin flakes of MoTe₂ prepared by mechanical exfoliation. We find that MoTe₂ flakes are superconducting and have an onset superconducting transition temperature ^T_c up to 5.3 K, which significantly exceeds that of its bulk counterpart. The in-plane upper critical field (^H_^c2||) is much higher than the Pauli paramagnetic limit, implying that the MoTe₂ flakes have Zeeman-protected Ising superconductivity. Furthermore, the ^T_c and ^H_^c2 can be tuned by up to 320 mK and 400 mT by applying a gate voltage. Our result indicates that MoTe₂ flake is a good candidate for studying exotic superconductivity with nontrivial topological properties.

关键词: transition metal dichalcogenide, Weyl semimetal, Ising superconductivity, magneto-transport

Abstract: Recently, the layered transition metal dichalcogenide 1T' MoTe₂ has attracted considerable attention due to its non-saturating magnetoresistance, type-II Weyl semimetal properties, superconductivity, and potential candidate for two-dimensional (2D) topological insulator in the single-and few-layer limit. Here in this work, we perform systematic transport measurements on thin flakes of MoTe₂ prepared by mechanical exfoliation. We find that MoTe₂ flakes are superconducting and have an onset superconducting transition temperature ^T_c up to 5.3 K, which significantly exceeds that of its bulk counterpart. The in-plane upper critical field (^H_^c2||) is much higher than the Pauli paramagnetic limit, implying that the MoTe₂ flakes have Zeeman-protected Ising superconductivity. Furthermore, the ^T_c and ^H_^c2 can be tuned by up to 320 mK and 400 mT by applying a gate voltage. Our result indicates that MoTe₂ flake is a good candidate for studying exotic superconductivity with nontrivial topological properties.

Key words: transition metal dichalcogenide, Weyl semimetal, Ising superconductivity, magneto-transport

中图分类号: (Transport properties)

74.25.F-

74.62.-c (Transition temperature variations, phase diagrams) 74.78.-w (Superconducting films and low-dimensional structures)

甘远, Chang-Woo Cho, 李阿蕾, 吕坚, 杜序, 温锦生, 张立源. Giant enhancement of superconductivity in few layers MoTe₂[J]. 中国物理B, 2019, 28(11): 117401-117401.

Yuan Gan(甘远), Chang-Woo Cho, Alei Li(李阿蕾), Jian Lyu(吕坚), Xu Du(杜序), Jin-Sheng Wen(温锦生), Li-Yuan Zhang(张立源). Giant enhancement of superconductivity in few layers MoTe₂[J]. Chin. Phys. B, 2019, 28(11): 117401-117401.

参考文献 32

[1]	Manzeli S, Ovchinnikov D, Pasquier D, Yazyev O V and Kis A 2017 Nat. Rev. Mater. 2 17033 doi: 10.1038/natrevmats.2017.33
[2]	Revolinsky E and Beerntsen 1966 J. Phys. Chem. Solids 27 523 doi: 10.1016/0022-3697(66)90195-8
[3]	Splendiani A, Sun L, Zhang Y, Li T, Kim J, Chim C Y, Galli G and Wang F 2010 Nano Lett. 10 1271 doi: 10.1021/nl903868w
[4]	Mak K F, Lee C, Hone J, Shan J and Heinz T F 2010 Phys. Rev. Lett. 105 136805 doi: 10.1103/PhysRevLett.105.136805
[5]	Dawson W and Bullett 1987 J. Phys. C-Solid State 20 6159 doi: 10.1088/0022-3719/20/36/017
[6]	Kan M, Nam H G, Lee Y H and Sun Q 2015 Phys. Chem. Chem. Phys. 17 14866 doi: 10.1039/C5CP01649E
[7]	Ali M N, Xiong J, Flynn S, Tao J, Gibson Q D Schoop L M, Liang T, Haldoaarachchige N, Hirschberger M, Ong N P and Cava J 2014 Nature 514 205 doi: 10.1038/nature13763
[8]	Rhodes D, Das S, Zhang Q R, Zeng B, Pradhan N R, Kikugawa N, Manousakis E and Balicas L 2015 Phys. Rev. B 92 125152 doi: 10.1103/PhysRevB.92.125152
[9]	Qi Y, Naumov P G, Ali M N, Rajamathi C R, Schnelle W, Barkalov O, Hanfl, M, Wu S C, Shekhar C, Sun Y, Süå V, Schmidt M, Schwarz U, Pippel E and Medvedev S A 2016 Nat. Commun. 7 11038 doi: 10.1038/ncomms11038
[10]	Lu J M, Zheliuk O, Leermakers I, Yuan N F Q, Zeitler U, Law K T and Ye J T 2015 Science 350 1353 doi: 10.1126/science.aab2277
[11]	Xi X, Wang Z, Zhao W, Park J H, Law K T, Berger H, Forró L, Shan J and Mak K F 2016 Nat. Phys. 12 139 doi: 10.1038/nphys3538
[12]	Chen C, Peng H, Hwang C C, Sun S Z, Mo S K, Vobornik I, Fujii J, Parkin S S P, Felser C, Yan B H and Chen Y L 2017 Nat. Commun. 8 13973 doi: 10.1038/ncomms13973
[13]	Chang T R, Xu S, Chang G, Lee C, Huang S, Wang B, Bian G, Zheng H, Sanchez D S, Belopolski I, Alidoust N, Neupane M, Bansil A, Jeng H, Lin H and Zahid Hasan M 2016 Nat. Commun. 7 10639 doi: 10.1038/ncomms10639
[14]	Tamai A, Wu Q S, Cucchi I, Bruno F Y, Riccó S, Kim T K, Hoesch M, Barreteau C, Giannini E, Besnard C, Soluyanov A A and Baumberger F 2016 Phys. Rev. X 6 031021
[15]	Wang Z, Gresch D, Soluyanov A A, Xie W, Kushwaha S, Dai X, Troyer M, Cava R J and Bernevig B A 2016 Phys. Rev. Lett. 117 56805 doi: 10.1103/PhysRevLett.117.056805
[16]	Chen F C, Luo X, Xiao R C, Lu W J, Zhang B, Yang H X, Li J Q, Pei Q L, Shao D F, Zhang R R, Ling L S, Xi C Y, Song W H and Sun Y P 2016 Appl. Phys. Lett. 108 162601 doi: 10.1063/1.4947433
[17]	Cui J, Li P, Zhou J, He W Y, Huang X, Yi J, Fan J, Ji Z, Jing X, Qu F, Cheng Z G, Yang C, Lu L, Suenaga K, Liu J, Law K T, Lin J, Liu Z and Liu G 2019 Nat. Commun. 10 2044 doi: 10.1038/s41467-019-09995-0
[18]	Fu L and Kane C L 2008 Phys. Rev. Lett. 100 96407 doi: 10.1103/PhysRevLett.100.096407
[19]	Yang L, Wu H, Zhang W, Chen Z, Li J, Lou X, Xie Z, Zhu R and Chang H 2018 Nanoscale 10 19906 doi: 10.1039/C8NR05699D
[20]	Beams R, Cancado L G, Krylyuk S, Kalish I, Kalanyan B, Singh A K, Choudhary K, Bruma A, Vora P M, Tavazza F, Davydov A V and Stranick S J 2016 ACS Nano 10 9626 doi: 10.1021/acsnano.6b05127
[21]	Song P, Hsu C, Zhao M, Zhao X, Chang T R, Teng J, Lin H and Loh K P 2018 2D Mater. 5 31010 doi: 10.1088/2053-1583/aac78d
[22]	Zhou Q, Rhodes D, Zhang Q R, Tang S, Schonemann R and Balicas L 2016 Phys. Rev. B 94 121101(R)
[23]	Hebard A F and Vandenberg J M 1980 Phys. Rev. Lett. 44 50 doi: 10.1103/PhysRevLett.44.50
[24]	Yazdani A and Kapitulnik A 1995 Phys. Rev. Lett. 74 3037 doi: 10.1103/PhysRevLett.74.3037
[25]	Okuma S, Terashima T and Kokubo N 1998 Phys. Rev. B 58 2816 doi: 10.1103/PhysRevB.58.2816
[26]	Zhang Y, Wong C H, Shen J, Sze S T, Zhang B, Zhang H, Dong Y, Xu H, Yan Z, Li Y, Hu X and Lortz R 2016 Sci. Rep. 6 32963 doi: 10.1038/srep32963
[27]	He M, Wong C H, Tse P L, Zheng Y, Zhang H, Lam F L Y, Sheng P, Hu X and Lortz R 2013 ACS Nano 7 4187 doi: 10.1021/nn400604v
[28]	He R, Zhong S, Kim Hyun H, Ye G, Winford L, McHaffie R I, Chen F, Luo X, Sun Y and Tsen W A 2018 Phys. Rev. B 97 041410(R)
[29]	Mandal M, Marik S, Sajilesh K P, Arushi, Singh D, Chakraborty J, Ganguli N and Singh R P 2018 Phys. Rev. Mater. 2 094201 doi: 10.1103/PhysRevMaterials.2.094201
[30]	Navarro-Moratalla E, Isl, J O, Mañas-Valero S, Pinilla-Cienfuegos E, Castellanos-Gomez A, Quereda J, Rubio-Bollinger G, Chirolli L, Silva-Guillén J A, Agraït N, Steele G A, Guinea F, van der Zant H S J and Coronado E 2016 Nat. Commun. 7 11043 doi: 10.1038/ncomms11043
[31]	Takahashi H, Akiba T, Imura K, Shiino T, Deguchi K, Sato N K, Sakai H, Bahramy M S and Ishiwata S 2017 Phys. Rev. B 95 100501 doi: 10.1103/PhysRevB.95.100501
[32]	Xi X, Berger H, Forró L, Shan J and Mak K F 2016 Phys. Rev. Lett. 117 106801 doi: 10.1103/PhysRevLett.117.106801

Giant enhancement of superconductivity in few layers MoTe₂

Giant enhancement of superconductivity in few layers MoTe₂

RichHTML

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献 32

相关文章 15

Metrics

本文评价

推荐阅读 0

[1]	Ji-Peng Wu(伍计鹏), Yuan-Jiang Xiang(项元江), and Xiao-Yu Dai(戴小玉). Enhanced and tunable Imbert-Fedorov shift based on epsilon-near-zero response of Weyl semimetal[J]. 中国物理B, 2023, 32(3): 37503-037503.
[2]	Bingyan Jiang(江丙炎), Jiaji Zhao(赵嘉佶), Lujunyu Wang(王陆君瑜), Ran Bi(毕然), Juewen Fan(范珏雯), Zhilin Li(李治林), and Xiaosong Wu(吴孝松). On the Onsager-Casimir reciprocal relations in a tilted Weyl semimetal[J]. 中国物理B, 2022, 31(9): 97306-097306.
[3]	Le Zhou(周乐), Hongwen Zhang(张洪文), Qian Zhao(赵倩), and Weiping Cai(蔡伟平). Onion-structured transition metal dichalcogenide nanoparticles by laser fabrication in liquids and atmospheres[J]. 中国物理B, 2022, 31(7): 76106-076106.
[4]	Jian-Min Wu(吴建民), Li-Hui Li(黎立辉), Wei-Hao Zheng(郑玮豪), Bi-Yuan Zheng(郑弼元), Zhe-Yuan Xu(徐哲元), Xue-Hong Zhang(张学红), Chen-Guang Zhu(朱晨光), Kun Wu(吴琨), Chi Zhang(张弛), Ying Jiang(蒋英),Xiao-Li Zhu(朱小莉), and Xiu-Juan Zhuang(庄秀娟). Exciton luminescence and many-body effect of monolayer WS₂ at room temperature[J]. 中国物理B, 2022, 31(5): 57803-057803.
[5]	Wen-Chong Li(李文充), Ling-Xiao Zhao(赵凌霄), Hai-Jun Zhao(赵海军),Gen-Fu Chen(陈根富), and Zhi-Xiang Shi(施智祥). Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs[J]. 中国物理B, 2022, 31(5): 57103-057103.
[6]	Mingqi Chang(苌名起), Yunfeng Ge(葛云凤), and Li Sheng(盛利). Generalization of the theory of three-dimensional quantum Hall effect of Fermi arcs in Weyl semimetal[J]. 中国物理B, 2022, 31(5): 57304-057304.
[7]	Haiting Yao(姚海婷), Xin Guo(郭鑫), Aida Bao(鲍爱达), Haiyang Mao(毛海央),Youchun Ma(马游春), and Xuechao Li(李学超). Graphene-based heterojunction for enhanced photodetectors[J]. 中国物理B, 2022, 31(3): 38501-038501.
[8]	Zi-Yuan Li(李子元), Qi Li(李骐), and Zhou Li(李舟). High-order harmonic generations in tilted Weyl semimetals[J]. 中国物理B, 2022, 31(12): 124204-124204.
[9]	Yinlu Gao(高寅露), Kai Cheng(程开), Xue Jiang(蒋雪), and Jijun Zhao(赵纪军). Interface engineering of transition metal dichalcogenide/GaN heterostructures: Modified broadband for photoelectronic performance[J]. 中国物理B, 2022, 31(11): 117304-117304.
[10]	Xian-Dong Li(李现东), Zuo-Dong Yu(余作东), Wei-Peng Chen(陈伟鹏), and Chang-De Gong(龚昌德). Topological superconductivity in Janus monolayer transition metal dichalcogenides[J]. 中国物理B, 2022, 31(11): 110304-110304.
[11]	Lijun Wu(吴莉君), Cuihuan Ge(葛翠环), Kai Braun, Mai He(贺迈), Siman Liu(刘思嫚), Qingjun Tong(童庆军), Xiao Wang(王笑), and Anlian Pan(潘安练). Polarized photoluminescence spectroscopy in WS₂, WSe₂ atomic layers and heterostructures by cylindrical vector beams[J]. 中国物理B, 2021, 30(8): 87802-087802.
[12]	Han Wang(王含) and Rui Shen(沈瑞). Josephson current in an irradiated Weyl semimetal junction[J]. 中国物理B, 2021, 30(7): 77406-077406.
[13]	Yanchong Zhao(赵岩翀), Tao Bo(薄涛), Luojun Du(杜罗军), Jinpeng Tian(田金朋), Xiaomei Li(李晓梅), Kenji Watanabe, Takashi Taniguchi, Rong Yang(杨蓉), Dongxia Shi(时东霞), Sheng Meng(孟胜), Wei Yang(杨威), and Guangyu Zhang(张广宇). Thermally induced band hybridization in bilayer-bilayer MoS₂/WS₂ heterostructure[J]. 中国物理B, 2021, 30(5): 57801-057801.
[14]	Meng-Nan Chen(陈梦南) and Wen-Chao Chen(陈文潮). Photoinduced Weyl semimetal phase and anomalous Hall effect in a three-dimensional topological insulator[J]. 中国物理B, 2021, 30(11): 110308-110308.
[15]	Zhe Wang(王喆) and Wenguang Zhu(朱文光). Metal substrates-induced phase transformation of monolayer transition metal dichalcogenides for hydrogen evolution catalysis[J]. 中国物理B, 2021, 30(11): 116401-116401.