Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure

Wan Hsin Chen; Chin Hsuan Chen; Guan Hao Chen; Wei Chuan Chen; Fu Xiang Rikudo Chen; Pei Jung Chen; Chun Kai Ku; Chang Tsan Lee; Naoya Kawakami; Jia Ying Li; Iwao Matsuda; Wen Hao Chang; Juhn Jong Lin; Chien Te Wu; Chung Yu Mou; Horng Tay Jeng; Shu Jung Tang; Chun Liang Lin

doi:10.1002/advs.202300845

Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure

Wan Hsin Chen, Chin Hsuan Chen, Guan Hao Chen, Wei Chuan Chen, Fu Xiang Rikudo Chen, Pei Jung Chen, Chun Kai Ku, Chang Tsan Lee, Naoya Kawakami, Jia Ying Li, Iwao Matsuda, Wen Hao Chang, Juhn Jong Lin, Chien Te Wu, Chung Yu Mou, Horng Tay Jeng^*, Shu Jung Tang^*, Chun Liang Lin^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Plumbene, with a structure similar to graphene, is expected to possess a strong spin–orbit coupling and thus enhances its superconducting critical temperature (T_c). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced T_c with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron–phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting T_c and Rashba effect, effectively triggering the novel properties of a plumbene.

Original language	English
Article number	2300845
Journal	Advanced Science
Volume	10
Issue number	17
DOIs	https://doi.org/10.1002/advs.202300845
State	Published - 13 Jun 2023

Keywords

Rashba effect
angle-resolved photoemission spectroscopy
buckled plumbene
density functional theory
electron–phonon coupling
scanning tunneling microscopy
superconductivity

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10.1002/advs.202300845

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Chen, W. H., Chen, C. H., Chen, G. H., Chen, W. C., Chen, F. X. R., Chen, P. J., Ku, C. K., Lee, C. T., Kawakami, N., Li, J. Y., Matsuda, I., Chang, W. H., Lin, J. J., Wu, C. T., Mou, C. Y., Jeng, H. T., Tang, S. J., & Lin, C. L. (2023). Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure. Advanced Science, 10(17), Article 2300845. https://doi.org/10.1002/advs.202300845

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title = "Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure",

abstract = "Plumbene, with a structure similar to graphene, is expected to possess a strong spin–orbit coupling and thus enhances its superconducting critical temperature (Tc). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced Tc with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron–phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting Tc and Rashba effect, effectively triggering the novel properties of a plumbene.",

keywords = "Rashba effect, angle-resolved photoemission spectroscopy, buckled plumbene, density functional theory, electron–phonon coupling, scanning tunneling microscopy, superconductivity",

author = "Chen, {Wan Hsin} and Chen, {Chin Hsuan} and Chen, {Guan Hao} and Chen, {Wei Chuan} and Chen, {Fu Xiang Rikudo} and Chen, {Pei Jung} and Ku, {Chun Kai} and Lee, {Chang Tsan} and Naoya Kawakami and Li, {Jia Ying} and Iwao Matsuda and Chang, {Wen Hao} and Lin, {Juhn Jong} and Wu, {Chien Te} and Mou, {Chung Yu} and Jeng, {Horng Tay} and Tang, {Shu Jung} and Lin, {Chun Liang}",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.",

year = "2023",

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AU - Chen, Wan Hsin

AU - Chen, Chin Hsuan

AU - Chen, Guan Hao

AU - Chen, Wei Chuan

AU - Chen, Fu Xiang Rikudo

AU - Chen, Pei Jung

AU - Ku, Chun Kai

AU - Lee, Chang Tsan

AU - Kawakami, Naoya

AU - Li, Jia Ying

AU - Matsuda, Iwao

AU - Chang, Wen Hao

AU - Lin, Juhn Jong

AU - Wu, Chien Te

AU - Mou, Chung Yu

AU - Jeng, Horng Tay

AU - Tang, Shu Jung

AU - Lin, Chun Liang

PY - 2023/6/13

Y1 - 2023/6/13

N2 - Plumbene, with a structure similar to graphene, is expected to possess a strong spin–orbit coupling and thus enhances its superconducting critical temperature (Tc). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced Tc with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron–phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting Tc and Rashba effect, effectively triggering the novel properties of a plumbene.

AB - Plumbene, with a structure similar to graphene, is expected to possess a strong spin–orbit coupling and thus enhances its superconducting critical temperature (Tc). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced Tc with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron–phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting Tc and Rashba effect, effectively triggering the novel properties of a plumbene.

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KW - angle-resolved photoemission spectroscopy

KW - buckled plumbene

KW - density functional theory

KW - electron–phonon coupling

KW - scanning tunneling microscopy

KW - superconductivity

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JO - Advanced Science

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Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure

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