Realizing Kagome Band Structure in Two-Dimensional Kagome Surface States of R V6Sn6 (R=Gd, Ho)

Shuting Peng; Yulei Han; Ganesh Pokharel; Jianchang Shen; Zeyu Li; Makoto Hashimoto; Donghui Lu; Brenden R. Ortiz; Yang Luo; Houchen Li; Mingyao Guo; Bingqian Wang; Shengtao Cui; Zhe Sun; Zhenhua Qiao; Stephen D. Wilson; Junfeng He

doi:10.1103/PhysRevLett.127.266401

Realizing Kagome Band Structure in Two-Dimensional Kagome Surface States of R V6Sn6 (R=Gd, Ho)

Shuting Peng, Yulei Han, Ganesh Pokharel, Jianchang Shen, Zeyu Li, Makoto Hashimoto, Donghui Lu, Brenden R. Ortiz, Yang Luo, Houchen Li, Mingyao Guo, Bingqian Wang, Shengtao Cui, Zhe Sun, Zhenhua Qiao, Stephen D. Wilson, Junfeng He

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

74 Scopus citations

Abstract

We report angle resolved photoemission experiments on a newly discovered family of kagome metals RV6Sn6 (R=Gd, Ho). Intrinsic bulk states and surface states of the vanadium kagome layer are differentiated from those of other atomic sublattices by the real-space resolution of the measurements with a small beam spot. Characteristic Dirac cone, saddle point, and flat bands of the kagome lattice are observed. Our results establish the two-dimensional (2D) kagome surface states as a new platform to investigate the intrinsic kagome physics.

Original language	English
Article number	266401
Journal	Physical Review Letters
Volume	127
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.127.266401
State	Published - Dec 24 2021
Externally published	Yes

Funding

The work at University of Science and Technology of China (USTC) was supported by the USTC start-up fund, NNSFC (No. 11974327 and No. 12004369), Fundamental Research Funds for the Central Universities (WK3510000010, WK3510000008 and WK2030020032), and Anhui Initiative in Quantum Information Technologies. We also thank the supercomputing service of AM-HPC and the Supercomputing Center of University of Science and Technology of China for providing the high performance computing resources. S. D. W. and G. P. acknowledge support from the University of California Santa Barbara Quantum Foundry, funded by the National Science Foundation (NSF DMR-1906325). B. R. O. also acknowledges support from the California NanoSystems Institute through the Elings Fellowship program. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.

Funders	Funder number
Anhui Initiative in Quantum Information Technologies
California NanoSystems Institute
University of California Santa Barbara Quantum Foundry
National Science Foundation	DMR-1906325
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-AC02-76SF00515
National Natural Science Foundation of China	12004369, 11974327
University of Science and Technology of China
Fundamental Research Funds for the Central Universities	WK3510000010, WK2030020032, WK3510000008

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10.1103/PhysRevLett.127.266401

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Peng, S., Han, Y., Pokharel, G., Shen, J., Li, Z., Hashimoto, M., Lu, D., Ortiz, B. R., Luo, Y., Li, H., Guo, M., Wang, B., Cui, S., Sun, Z., Qiao, Z., Wilson, S. D., & He, J. (2021). Realizing Kagome Band Structure in Two-Dimensional Kagome Surface States of R V6Sn6 (R=Gd, Ho). Physical Review Letters, 127(26), Article 266401. https://doi.org/10.1103/PhysRevLett.127.266401

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abstract = "We report angle resolved photoemission experiments on a newly discovered family of kagome metals RV6Sn6 (R=Gd, Ho). Intrinsic bulk states and surface states of the vanadium kagome layer are differentiated from those of other atomic sublattices by the real-space resolution of the measurements with a small beam spot. Characteristic Dirac cone, saddle point, and flat bands of the kagome lattice are observed. Our results establish the two-dimensional (2D) kagome surface states as a new platform to investigate the intrinsic kagome physics.",

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AU - Shen, Jianchang

AU - Li, Zeyu

AU - Hashimoto, Makoto

AU - Lu, Donghui

AU - Ortiz, Brenden R.

AU - Luo, Yang

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AU - Guo, Mingyao

AU - Wang, Bingqian

AU - Cui, Shengtao

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AU - Qiao, Zhenhua

AU - Wilson, Stephen D.

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AB - We report angle resolved photoemission experiments on a newly discovered family of kagome metals RV6Sn6 (R=Gd, Ho). Intrinsic bulk states and surface states of the vanadium kagome layer are differentiated from those of other atomic sublattices by the real-space resolution of the measurements with a small beam spot. Characteristic Dirac cone, saddle point, and flat bands of the kagome lattice are observed. Our results establish the two-dimensional (2D) kagome surface states as a new platform to investigate the intrinsic kagome physics.

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Realizing Kagome Band Structure in Two-Dimensional Kagome Surface States of R V6Sn6 (R=Gd, Ho)

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