中国物理B ›› 2023, Vol. 32 ›› Issue (11): 117303-117303.doi: 10.1088/1674-1056/ad0147

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Low-damage photolithography for magnetically doped (Bi,Sb)2Te3 quantum anomalous Hall thin films

Zhiting Gao(高志廷)1,2,†, Minghua Guo(郭明华)1,3,†, Zichen Lian(连梓臣)1,†, Yaoxin Li(李耀鑫)1, Yunhe Bai(白云鹤)1, Xiao Feng(冯硝)1,2,4,5, Ke He(何珂)1,2,4,5, Yayu Wang(王亚愚)1,4,5, Chang Liu(刘畅)6,7,‡, and Jinsong Zhang(张金松)1,4,5,§   

  1. 1 State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2 Beijing Academy of Quantum Information Sciences, Beijing 100193, China;
    3 School of Integrated Circuits, Tsinghua University, Beijing 100084, China;
    4 Frontier Science Center for Quantum Information, Beijing 100084, China;
    5 Hefei National Laboratory, Hefei 230088, China;
    6 Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China;
    7 Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education), Renmin University of China, Beijing 100872, China
  • 收稿日期:2023-08-03 修回日期:2023-09-24 接受日期:2023-10-09 出版日期:2023-10-16 发布日期:2023-10-31
  • 通讯作者: Chang Liu, Jinsong Zhang E-mail:liuchang_phy@ruc.edu.cn;jinsongzhang@tsinghua.edu.cn
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (Grant No. 2018YFA0307100), the Basic Science Center Project of the National Natural Science Foundation of China (Grant No. 52388201), the National Natural Science Foundation of China (Grant Nos. 12274453 and 92065206), and the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302502). Chang Liu was also supported by Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF202204). Yayu Wang was also supported by the New Cornerstone Science Foundation through the New Cornerstone Investigator Program and the XPLORER PRIZE.

Low-damage photolithography for magnetically doped (Bi,Sb)2Te3 quantum anomalous Hall thin films

Zhiting Gao(高志廷)1,2,†, Minghua Guo(郭明华)1,3,†, Zichen Lian(连梓臣)1,†, Yaoxin Li(李耀鑫)1, Yunhe Bai(白云鹤)1, Xiao Feng(冯硝)1,2,4,5, Ke He(何珂)1,2,4,5, Yayu Wang(王亚愚)1,4,5, Chang Liu(刘畅)6,7,‡, and Jinsong Zhang(张金松)1,4,5,§   

  1. 1 State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2 Beijing Academy of Quantum Information Sciences, Beijing 100193, China;
    3 School of Integrated Circuits, Tsinghua University, Beijing 100084, China;
    4 Frontier Science Center for Quantum Information, Beijing 100084, China;
    5 Hefei National Laboratory, Hefei 230088, China;
    6 Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, China;
    7 Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education), Renmin University of China, Beijing 100872, China
  • Received:2023-08-03 Revised:2023-09-24 Accepted:2023-10-09 Online:2023-10-16 Published:2023-10-31
  • Contact: Chang Liu, Jinsong Zhang E-mail:liuchang_phy@ruc.edu.cn;jinsongzhang@tsinghua.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (Grant No. 2018YFA0307100), the Basic Science Center Project of the National Natural Science Foundation of China (Grant No. 52388201), the National Natural Science Foundation of China (Grant Nos. 12274453 and 92065206), and the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302502). Chang Liu was also supported by Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF202204). Yayu Wang was also supported by the New Cornerstone Science Foundation through the New Cornerstone Investigator Program and the XPLORER PRIZE.

摘要: We have developed a low-damage photolithography method for magnetically doped (Bi,Sb)2Te3 quantum anomalous Hall (QAH) thin films incorporating an additional resist layer of poly(methyl methacrylate) (PMMA). By performing control experiments on the transport properties of five devices at varied gate voltages (Vgs), we revealed that the modified photolithography method enables fabricating QAH devices with the transport and magnetic properties unaffected by fabrication process. Our experiment represents a step towards the production of novel micro-structured electronic devices based on the dissipationless QAH chiral edge states.

关键词: topological insulator, quantum anomalous Hall effect, fabrication techniques

Abstract: We have developed a low-damage photolithography method for magnetically doped (Bi,Sb)2Te3 quantum anomalous Hall (QAH) thin films incorporating an additional resist layer of poly(methyl methacrylate) (PMMA). By performing control experiments on the transport properties of five devices at varied gate voltages (Vgs), we revealed that the modified photolithography method enables fabricating QAH devices with the transport and magnetic properties unaffected by fabrication process. Our experiment represents a step towards the production of novel micro-structured electronic devices based on the dissipationless QAH chiral edge states.

Key words: topological insulator, quantum anomalous Hall effect, fabrication techniques

中图分类号:  (Electron states at surfaces and interfaces)

  • 73.20.-r
73.50.-h (Electronic transport phenomena in thin films) 42.82.Cr (Fabrication techniques; lithography, pattern transfer)