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Large-Area Freestanding Weyl Semimetal WTe2 Membranes

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【作者】 陈业全； 刘汝新； 陈勇达； 袁霄； 宁纪爱； 张纯臣； 陈立明； 王鹏； 何亮； 张荣； 徐永兵； 王学锋；

【Author】 Yequan Chen;Ruxin Liu;Yongda Chen;Xiao Yuan;Jiai Ning;Chunchen Zhang;Liming Chen;Peng Wang;Liang He;Rong Zhang;Yongbing Xu;Xuefeng Wang;Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University;College of Engineering and Applied Sciences, Nanjing University;

【通讯作者】 徐永兵;王学锋;

【机构】 Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University； College of Engineering and Applied Sciences, Nanjing University；

【摘要】 We report a universal transfer methodology for producing artificial heterostructures of large-area freestanding single-crystalline WTe2 membranes on diverse target substrates.The transferred WTe2 membranes exhibit a nondestructive structure with a carrier mobility comparable to that of as-grown films(～179-1055 cm2·V-1·s-1).Furthermore,the transferred membranes show distinct Shubnikov-de Haas quantum oscillations as well as weak localization/weak anti-localization.These results provide a new approach to the development of atom manufacturing and devices based on atomic-level,large-area topological quantum films.

【Abstract】 We report a universal transfer methodology for producing artificial heterostructures of large-area freestanding single-crystalline WTe2 membranes on diverse target substrates.The transferred WTe2 membranes exhibit a nondestructive structure with a carrier mobility comparable to that of as-grown films(～179-1055 cm2·V-1·s-1).Furthermore,the transferred membranes show distinct Shubnikov-de Haas quantum oscillations as well as weak localization/weak anti-localization.These results provide a new approach to the development of atom manufacturing and devices based on atomic-level,large-area topological quantum films.

【关键词】 crystalline； localization； topological； transferred； resistivity； comparable； universal； diverse； producing； nondestructive；
【基金】 Supported by the National Key R&D Program of China (Grant No. 2017YFA0206304);the National Natural Science Foundation of China (Grant Nos. 11874203,61822403,U1732159,11774160,and 61427812);the Fundamental Research Funds for the Central Universities (Grant No. 021014380080)
  • 【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2021年01期
  • 【分类号】O469
  • 【下载频次】38
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