Charge order landscape and competition with superconductivity in kagome metals

Mingu Kang; Shiang Fang; Jonggyu Yoo; Brenden R. Ortiz; Yuzki M. Oey; Jonghyeok Choi; Sae Hee Ryu; Jimin Kim; Chris Jozwiak; Aaron Bostwick; Eli Rotenberg; Efthimios Kaxiras; Joseph G. Checkelsky; Stephen D. Wilson; Jae Hoon Park; Riccardo Comin

doi:10.1038/s41563-022-01375-2

Charge order landscape and competition with superconductivity in kagome metals

Mingu Kang, Shiang Fang, Jonggyu Yoo, Brenden R. Ortiz, Yuzki M. Oey, Jonghyeok Choi, Sae Hee Ryu, Jimin Kim, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Efthimios Kaxiras, Joseph G. Checkelsky, Stephen D. Wilson, Jae Hoon Park, Riccardo Comin

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

64 Scopus citations

Abstract

In the kagome metals AV₃Sb₅ (A = K, Rb, Cs), three-dimensional charge order is the primary instability that sets the stage for other collective orders to emerge, including unidirectional stripe order, orbital flux order, electronic nematicity and superconductivity. Here, we use high-resolution angle-resolved photoemission spectroscopy to determine the microscopic structure of three-dimensional charge order in AV₃Sb₅ and its interplay with superconductivity. Our approach is based on identifying an unusual splitting of kagome bands induced by three-dimensional charge order, which provides a sensitive way to refine the spatial charge patterns in neighbouring kagome planes. We found a marked dependence of the three-dimensional charge order structure on composition and doping. The observed difference between CsV₃Sb₅ and the other compounds potentially underpins the double-dome superconductivity in CsV₃(Sb,Sn)₅ and the suppression of T_c in KV₃Sb₅ and RbV₃Sb₅. Our results provide fresh insights into the rich phase diagram of AV₃Sb₅.

Original language	English
Pages (from-to)	186-193
Number of pages	8
Journal	Nature Materials
Volume	22
Issue number	2
DOIs	https://doi.org/10.1038/s41563-022-01375-2
State	Published - Feb 2023
Externally published	Yes

Funding

This work was supported by the Air Force Office of Scientific Research Young Investigator Program under grant FA9550-19-1-0063, and by the STC Center for Integrated Quantum Materials (National Science Foundation grant no. DMR-1231319). The work is funded in part by the Gordon and Betty Moore Foundation’s EPiQS Initiative, grant GBMF9070 to J.G.C. The work at Max Planck POSTECH/Korea Research Initiative was supported by the National Research Foundation of Korea funded by the Ministry of Science and ICT, grant nos 2022M3H4A1A04074153 and 2020M3H4A2084417. B.R.O. and S.D.W. were supported by the National Science Foundation through the programme Enabling Quantum Leap: Convergent Accelerated Discovery Foundries for Quantum Materials Science, Engineering and Information (Q-AMASE-i) and the Quantum Foundry at University of California Santa Barbara (DMR-1906325). This research used resources of the Advanced Light Source, a US Department of Energy Office of Science User Facility under contract no. DE-AC02-05CH11231. M.K. acknowledges a Samsung Scholarship from the Samsung Foundation of Culture. B.R.O. acknowledges support from the California NanoSystems Institute through the Elings Fellowship programme.

Funders	Funder number
Materials Science, Engineering and Information
STC Center for Integrated Quantum Materials
Samsung Foundation of Culture
National Science Foundation	DMR-1231319
Air Force Office of Scientific Research	FA9550-19-1-0063
Gordon and Betty Moore Foundation	GBMF9070
Office of Science	DE-AC02-05CH11231
University of California, Santa Barbara	DMR-1906325
California NanoSystems Institute
Ministry of Science, ICT and Future Planning	2020M3H4A2084417, 2022M3H4A1A04074153
National Research Foundation of Korea

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10.1038/s41563-022-01375-2

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title = "Charge order landscape and competition with superconductivity in kagome metals",

abstract = "In the kagome metals AV3Sb5 (A = K, Rb, Cs), three-dimensional charge order is the primary instability that sets the stage for other collective orders to emerge, including unidirectional stripe order, orbital flux order, electronic nematicity and superconductivity. Here, we use high-resolution angle-resolved photoemission spectroscopy to determine the microscopic structure of three-dimensional charge order in AV3Sb5 and its interplay with superconductivity. Our approach is based on identifying an unusual splitting of kagome bands induced by three-dimensional charge order, which provides a sensitive way to refine the spatial charge patterns in neighbouring kagome planes. We found a marked dependence of the three-dimensional charge order structure on composition and doping. The observed difference between CsV3Sb5 and the other compounds potentially underpins the double-dome superconductivity in CsV3(Sb,Sn)5 and the suppression of Tc in KV3Sb5 and RbV3Sb5. Our results provide fresh insights into the rich phase diagram of AV3Sb5.",

author = "Mingu Kang and Shiang Fang and Jonggyu Yoo and Ortiz, {Brenden R.} and Oey, {Yuzki M.} and Jonghyeok Choi and Ryu, {Sae Hee} and Jimin Kim and Chris Jozwiak and Aaron Bostwick and Eli Rotenberg and Efthimios Kaxiras and Checkelsky, {Joseph G.} and Wilson, {Stephen D.} and Park, {Jae Hoon} and Riccardo Comin",

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doi = "10.1038/s41563-022-01375-2",

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AU - Kang, Mingu

AU - Fang, Shiang

AU - Yoo, Jonggyu

AU - Ortiz, Brenden R.

AU - Oey, Yuzki M.

AU - Choi, Jonghyeok

AU - Ryu, Sae Hee

AU - Kim, Jimin

AU - Jozwiak, Chris

AU - Bostwick, Aaron

AU - Rotenberg, Eli

AU - Kaxiras, Efthimios

AU - Checkelsky, Joseph G.

AU - Wilson, Stephen D.

AU - Park, Jae Hoon

AU - Comin, Riccardo

PY - 2023/2

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N2 - In the kagome metals AV3Sb5 (A = K, Rb, Cs), three-dimensional charge order is the primary instability that sets the stage for other collective orders to emerge, including unidirectional stripe order, orbital flux order, electronic nematicity and superconductivity. Here, we use high-resolution angle-resolved photoemission spectroscopy to determine the microscopic structure of three-dimensional charge order in AV3Sb5 and its interplay with superconductivity. Our approach is based on identifying an unusual splitting of kagome bands induced by three-dimensional charge order, which provides a sensitive way to refine the spatial charge patterns in neighbouring kagome planes. We found a marked dependence of the three-dimensional charge order structure on composition and doping. The observed difference between CsV3Sb5 and the other compounds potentially underpins the double-dome superconductivity in CsV3(Sb,Sn)5 and the suppression of Tc in KV3Sb5 and RbV3Sb5. Our results provide fresh insights into the rich phase diagram of AV3Sb5.

AB - In the kagome metals AV3Sb5 (A = K, Rb, Cs), three-dimensional charge order is the primary instability that sets the stage for other collective orders to emerge, including unidirectional stripe order, orbital flux order, electronic nematicity and superconductivity. Here, we use high-resolution angle-resolved photoemission spectroscopy to determine the microscopic structure of three-dimensional charge order in AV3Sb5 and its interplay with superconductivity. Our approach is based on identifying an unusual splitting of kagome bands induced by three-dimensional charge order, which provides a sensitive way to refine the spatial charge patterns in neighbouring kagome planes. We found a marked dependence of the three-dimensional charge order structure on composition and doping. The observed difference between CsV3Sb5 and the other compounds potentially underpins the double-dome superconductivity in CsV3(Sb,Sn)5 and the suppression of Tc in KV3Sb5 and RbV3Sb5. Our results provide fresh insights into the rich phase diagram of AV3Sb5.

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Charge order landscape and competition with superconductivity in kagome metals

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