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

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

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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.

2 ML Pb filmssuperconductivityatomic structurescanning tunneling microscopyfirst-principle calculations

Kun Xie、Ze Huang、Pengju Li、Yumin Xia、Desheng Cai、Yitong Gu、Yuzhou Liu、Fangliang Cai、Runxiao Zhang、Haohao Shi、Ping Cui、Shengyong Qin

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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

National Key Basic Research Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesInnovation Program for Quantum Science and TechnologyAnhui Initiative in Quantum Information Technologies

2017YFA020500492165201114742611163401111974323WK3510000006WK34300000032021ZD0302800AHY170000

2024

10.1007/s11433-023-2191-5

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
年,卷(期)：2024.67(1)
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