中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(1) ：90-98.DOI:10.1007/s11433-023-2191-5

Interplay between the atomic structures and superconductivity of two-monolayer Pb films

Kun Xie Ze Huang Pengju Li Yumin Xia Desheng Cai Yitong Gu Yuzhou Liu Fangliang Cai Runxiao Zhang Haohao Shi Ping Cui Shengyong Qin
中国科学:物理学 力学 天文学(英文版)2024，Vol.67Issue(1) ：90-98.DOI:10.1007/s11433-023-2191-5
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  • 维普
  • 万方数据

Interplay between the atomic structures and superconductivity of two-monolayer Pb films

Kun Xie 1Ze Huang 1Pengju Li 1Yumin Xia 1Desheng Cai 1Yitong Gu 1Yuzhou Liu 1Fangliang Cai 1Runxiao Zhang 1Haohao Shi 1Ping Cui 2Shengyong Qin3
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作者信息

  • 1. International Center for Quantum Design of Functional Materials(ICQD),University of Science and Technology of China,Hefei 230026,China;CAS Key Laboratory of Strongly Coupled Quantum Matter Physics,Department of Physics,University of Science and Technology of China,Hefei 230026,China
  • 2. International Center for Quantum Design of Functional Materials(ICQD),University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China
  • 3. International Center for Quantum Design of Functional Materials(ICQD),University of Science and Technology of China,Hefei 230026,China;CAS Key Laboratory of Strongly Coupled Quantum Matter Physics,Department of Physics,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China
  • 折叠

Abstract

Superconductors with reduced dimensionality have been widely explored for their exotic superconducting behaviors.Especially,at the two-dimensional limit,two-monolayer Pb films with two types of structures provide an ideal platform to unveil the under-lying superconducting mechanism[Science 324,1314(2009)].Here,by combining scanning tunneling microscopy(STM)with the first-principle calculations,we successfully identify that these two types have different atomic lattice structures with varying stacking phases,which further enables us to calculate the phonon spectrum and electron phonon coupling strength of each type.The theoretical calculations are in good agreement with tunneling spectroscopy measurements of the superconducting transition temperatures(Tc),which established a correlation between atomic structures and superconductivity.Moreover,it was observed that the higher Tc of these two types also possess higher out-of-plane upper critical magnetic fields(Hc2).These findings will provide important new insights into two-dimensional superconductivity at the atomic level.

Key words

2 ML Pb films/superconductivity/atomic structure/scanning tunneling microscopy/first-principle calculations

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基金项目

National Key Basic Research Program of China(2017YFA0205004)

National Natural Science Foundation of China(92165201)

National Natural Science Foundation of China(11474261)

National Natural Science Foundation of China(11634011)

National Natural Science Foundation of China(11974323)

Fundamental Research Funds for the Central Universities(WK3510000006)

Fundamental Research Funds for the Central Universities(WK3430000003)

Innovation Program for Quantum Science and Technology(2021ZD0302800)

Anhui Initiative in Quantum Information Technologies(AHY170000)

出版年

2024
中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
参考文献量73
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