A unique van Hove singularity in kagome superconductor CsV3-xTaxSb5 with enhanced superconductivity

Luo, Yang; Han, Yulei; Liu, Jinjin; Chen, Hui; Huang, Zihao; Huai, Linwei; Li, Hongyu; Wang, Bingqian; Shen, Jianchang; Ding, Shuhan; Li, Zeyu; Peng, Shuting; Wei, Zhiyuan; Miao, Yu; Sun, Xiupeng; Ou, Zhipeng; Xiang, Ziji; Hashimoto, Makoto; Lu, Donghui; Yao, Yugui; Yang, Haitao; Chen, Xianhui; Gao, Hong-Jun; Qiao, Zhenhua; Wang, Zhiwei; He, Junfeng

doi:10.1038/s41467-023-39500-7

A unique van Hove singularity in kagome superconductor CsV_3-xTa_xSb₅ with enhanced superconductivity

Journal Article · Wed Jun 28 04:00:00 EDT 2023 · Nature Communications

DOI:https://doi.org/10.1038/s41467-023-39500-7· OSTI ID:2000077

Luo, Yang ^[1]; ^[2]; Liu, Jinjin ^[3]; ^[4]; Huang, Zihao ^[4]; Huai, Linwei ^[5]; Li, Hongyu ^[5]; Wang, Bingqian ^[5]; Shen, Jianchang ^[5]; Ding, Shuhan ^[5]; Li, Zeyu ^[5]; ^[5]; Wei, Zhiyuan ^[5]; Miao, Yu ^[5]; Sun, Xiupeng ^[5]; Ou, Zhipeng ^[5]; ^[5]; ^[6]; ^[6]; ^[3] more »

Univ. of Science and Technology of China, Hefei (China); SLAC
Fuzhou Univ. (China)
Beijing Institute of Technology (China)
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics and Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
Univ. of Science and Technology of China, Hefei (China)
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

Van Hove singularity (VHS) has been considered as a driving source for unconventional superconductivity. A VHS in two-dimensional (2D) materials consists of a saddle point connecting electron-like and hole-like bands. In a rare case, when a VHS appears at Fermi level, both electron-like and hole-like conduction can coexist, giving rise to an enhanced density of states as well as an attractive component of Coulomb interaction for unconventional electronic pairing. However, this van Hove scenario is often destroyed by an incorrect chemical potential or competing instabilities. Here, by using angle-resolved photoemission measurements, we report the observation of a VHS perfectly aligned with the Fermi level in a kagome superconductor CsV_3-xTa_xSb₅ (x~ 0.4), in which a record-high superconducting transition temperature is achieved among all the current variants of AV₃Sb₅ (A = Cs, Rb, K) at ambient pressure. Doping dependent measurements reveal the important role of van Hove scenario in boosting superconductivity, and spectroscopic-imaging scanning tunneling microscopy measurements indicate a distinct superconducting state in this system.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; Innovation Program for Quantum Science and Technology; Anhui Initiative in Quantum Information Technologies; National Key Research and Development Program of China; Beijing Natural Science Foundation; Beijing Institute of Technology (BIT); Chinese Academy of Sciences (CAS)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 2000077

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

References (47)

A survey of the Van Hove scenario for high-tc superconductivity with special emphasis on pseudogaps and striped phases Markiewicz, R. S. Journal of Physics and Chemistry of Solids, Vol. 58, Issue 8 https://doi.org/10.1016/S0022-3697(97)00025-5	journal	August 1997
VASPKIT: A user-friendly interface facilitating high-throughput computing and analysis using VASP code Wang, Vei; Xu, Nan; Liu, Jin-Cheng Computer Physics Communications, Vol. 267 https://doi.org/10.1016/j.cpc.2021.108033	journal	October 2021
Topological surface states and flat bands in the kagome superconductor CsV3Sb5 Hu, Yong; Teicher, Samuel M. L.; Ortiz, Brenden R. Science Bulletin, Vol. 67, Issue 5 https://doi.org/10.1016/j.scib.2021.11.026	journal	March 2022
Titanium doped kagome superconductor CsV3−Ti Sb5 and two distinct phases Yang, Haitao; Huang, Zihao; Zhang, Yuhang Science Bulletin, Vol. 67, Issue 21 https://doi.org/10.1016/j.scib.2022.10.015	journal	November 2022
Intra-unit-cell electronic nematicity of the high-Tc copper-oxide pseudogap states Lawler, M. J.; Fujita, K.; Lee, Jhinhwan Nature, Vol. 466, Issue 7304 https://doi.org/10.1038/nature09169	journal	July 2010
Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal Yu, F. H.; Ma, D. H.; Zhuo, W. Z. Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-021-23928-w	journal	June 2021
Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV3Sb5 Luo, Hailan; Gao, Qiang; Liu, Hongxiong Nature Communications, Vol. 13, Issue 1 https://doi.org/10.1038/s41467-021-27946-6	journal	January 2022
Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5 Hu, Yong; Wu, Xianxin; Ortiz, Brenden R. Nature Communications, Vol. 13, Issue 1 https://doi.org/10.1038/s41467-022-29828-x	journal	April 2022
Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit Song, Boqin; Ying, Tianping; Wu, Xianxin Nature Communications, Vol. 14, Issue 1 https://doi.org/10.1038/s41467-023-38257-3	journal	April 2023
Optical detection of the density-wave instability in the kagome metal KV3Sb5 Uykur, Ece; Ortiz, Brenden R.; Wilson, Stephen D. npj Quantum Materials, Vol. 7, Issue 1 https://doi.org/10.1038/s41535-021-00420-8	journal	January 2022
Unconventional chiral charge order in kagome superconductor KV3Sb5 Jiang, Yu-Xiao; Yin, Jia-Xin; Denner, M. Michael Nature Materials https://doi.org/10.1038/s41563-021-01034-y	journal	June 2021
Twofold van Hove singularity and origin of charge order in topological kagome superconductor CsV3Sb5 Kang, Mingu; Fang, Shiang; Kim, Jeong-Kyu Nature Physics https://doi.org/10.1038/s41567-021-01451-5	journal	January 2022
Cascade of correlated electron states in the kagome superconductor CsV3Sb5 Zhao, He; Li, Hong; Ortiz, Brenden R. Nature, Vol. 599, Issue 7884 https://doi.org/10.1038/s41586-021-03946-w	journal	September 2021
Roton pair density wave in a strong-coupling kagome superconductor Chen, Hui; Yang, Haitao; Hu, Bin Nature, Vol. 599, Issue 7884 https://doi.org/10.1038/s41586-021-03983-5	journal	September 2021
Time-reversal symmetry-breaking charge order in a kagome superconductor Mielke, C.; Das, D.; Yin, J. -X. Nature, Vol. 602, Issue 7896 https://doi.org/10.1038/s41586-021-04327-z	journal	February 2022
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu Grimme, Stefan; Antony, Jens; Ehrlich, Stephan The Journal of Chemical Physics, Vol. 132, Issue 15 https://doi.org/10.1063/1.3382344	journal	April 2010
Superconductivity and Normal-State Properties of Kagome Metal RbV ₃ Sb ₅ Single Crystals Yin, Qiangwei; Tu, Zhijun; Gong, Chunsheng Chinese Physics Letters, Vol. 38, Issue 3 https://doi.org/10.1088/0256-307X/38/3/037403	journal	March 2021
Electronic instabilities of kagome metals: Saddle points and Landau theory Park, Takamori; Ye, Mengxing; Balents, Leon Physical Review B, Vol. 104, Issue 3 https://doi.org/10.1103/PhysRevB.104.035142	journal	July 2021
Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in the kagome metals A V 3 Sb 5 ( A =K, Rb, Cs) Lin, Yu-Ping; Nandkishore, Rahul M. Physical Review B, Vol. 104, Issue 4 https://doi.org/10.1103/PhysRevB.104.045122	journal	July 2021
Origin of charge density wave in the kagome metal CsV 3 Sb 5 as revealed by optical spectroscopy Zhou, Xiaoxiang; Li, Yongkai; Fan, Xinwei Physical Review B, Vol. 104, Issue 4 https://doi.org/10.1103/PhysRevB.104.L041101	journal	July 2021
Multiple energy scales and anisotropic energy gap in the charge-density-wave phase of the kagome superconductor CsV 3 Sb 5 Nakayama, Kosuke; Li, Yongkai; Kato, Takemi Physical Review B, Vol. 104, Issue 16 https://doi.org/10.1103/PhysRevB.104.L161112	journal	October 2021
Structural instability and charge modulations in the kagome superconductor AV3Sb5 Ye, Zijin; Luo, Aiyun; Yin, Jia-Xin Physical Review B, Vol. 105, Issue 24 https://doi.org/10.1103/PhysRevB.105.245121	journal	June 2022
Optical study of RbV3Sb5 : Multiple density-wave gaps and phonon anomalies Wenzel, M.; Ortiz, B. R.; Wilson, S. D. Physical Review B, Vol. 105, Issue 24 https://doi.org/10.1103/PhysRevB.105.245123	journal	June 2022
Electron-phonon coupling in the charge density wave state of CsV3Sb5 Xie, Yaofeng; Li, Yongkai; Bourges, Philippe Physical Review B, Vol. 105, Issue 14 https://doi.org/10.1103/PhysRevB.105.L140501	journal	April 2022
Electronic states dressed by an out-of-plane supermodulation in the quasi-two-dimensional kagome superconductor CsV3Sb5 Luo, Yang; Peng, Shuting; Teicher, Samuel M. L. Physical Review B, Vol. 105, Issue 24 https://doi.org/10.1103/PhysRevB.105.L241111	journal	June 2022
Projector augmented-wave method Blöchl, P. E. Physical Review B, Vol. 50, Issue 24, p. 17953-17979 https://doi.org/10.1103/PhysRevB.50.17953	journal	December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set Kresse, G.; Furthmüller, J. Physical Review B, Vol. 54, Issue 16, p. 11169-11186 https://doi.org/10.1103/PhysRevB.54.11169	journal	October 1996
From ultrasoft pseudopotentials to the projector augmented-wave method Kresse, G.; Joubert, D. Physical Review B, Vol. 59, Issue 3, p. 1758-1775 https://doi.org/10.1103/PhysRevB.59.1758	journal	January 1999
Doped kagome system as exotic superconductor Ko, Wing-Ho; Lee, Patrick A.; Wen, Xiao-Gang Physical Review B, Vol. 79, Issue 21 https://doi.org/10.1103/PhysRevB.79.214502	journal	June 2009
Extracting E versus k ⃗ effective band structure from supercell calculations on alloys and impurities Popescu, Voicu; Zunger, Alex Physical Review B, Vol. 85, Issue 8 https://doi.org/10.1103/PhysRevB.85.085201	journal	February 2012
Chiral superconducting phase and chiral spin-density-wave phase in a Hubbard model on the kagome lattice Yu, Shun-Li; Li, Jian-Xin Physical Review B, Vol. 85, Issue 14 https://doi.org/10.1103/PhysRevB.85.144402	journal	April 2012
Competing electronic orders on kagome lattices at van Hove filling Wang, Wan-Sheng; Li, Zheng-Zhao; Xiang, Yuan-Yuan Physical Review B, Vol. 87, Issue 11 https://doi.org/10.1103/PhysRevB.87.115135	journal	March 2013
Effective Band Structure of Random Alloys Popescu, Voicu; Zunger, Alex Physical Review Letters, Vol. 104, Issue 23 https://doi.org/10.1103/PhysRevLett.104.236403	journal	June 2010
Unconventional Fermi Surface Instabilities in the Kagome Hubbard Model Kiesel, Maximilian L.; Platt, Christian; Thomale, Ronny Physical Review Letters, Vol. 110, Issue 12 https://doi.org/10.1103/PhysRevLett.110.126405	journal	March 2013
Cs V 3 Sb 5 : A Z 2 Topological Kagome Metal with a Superconducting Ground State Ortiz, Brenden R.; Teicher, Samuel M. L.; Hu, Yong Physical Review Letters, Vol. 125, Issue 24 https://doi.org/10.1103/PhysRevLett.125.247002	journal	December 2020
Double Superconducting Dome and Triple Enhancement of T c in the Kagome Superconductor CsV 3 Sb 5 under High Pressure Chen, K. Y.; Wang, N. N.; Yin, Q. W. Physical Review Letters, Vol. 126, Issue 24 https://doi.org/10.1103/PhysRevLett.126.247001	journal	June 2021
Charge Density Waves and Electronic Properties of Superconducting Kagome Metals Tan, Hengxin; Liu, Yizhou; Wang, Ziqiang Physical Review Letters, Vol. 127, Issue 4 https://doi.org/10.1103/PhysRevLett.127.046401	journal	July 2021
Nature of Unconventional Pairing in the Kagome Superconductors A V 3 Sb 5 ( A = K , Rb , Cs ) Wu, Xianxin; Schwemmer, Tilman; Müller, Tobias Physical Review Letters, Vol. 127, Issue 17 https://doi.org/10.1103/PhysRevLett.127.177001	journal	October 2021
Analysis of Charge Order in the Kagome Metal A V 3 Sb 5 ( A = K , Rb , Cs ) Denner, M. Michael; Thomale, Ronny; Neupert, Titus Physical Review Letters, Vol. 127, Issue 21 https://doi.org/10.1103/PhysRevLett.127.217601	journal	November 2021
Emergence of New van Hove Singularities in the Charge Density Wave State of a Topological Kagome Metal RbV 3 Sb 5 Cho, Soohyun; Ma, Haiyang; Xia, Wei Physical Review Letters, Vol. 127, Issue 23 https://doi.org/10.1103/PhysRevLett.127.236401	journal	December 2021
Competition of Superconductivity and Charge Density Wave in Selective Oxidized CsV 3 Sb 5 Thin Flakes Song, Yanpeng; Ying, Tianping; Chen, Xu Physical Review Letters, Vol. 127, Issue 23 https://doi.org/10.1103/PhysRevLett.127.237001	journal	December 2021
Charge-Density-Wave-Induced Peak-Dip-Hump Structure and the Multiband Superconductivity in a Kagome Superconductor CsV 3 Sb 5 Lou, Rui; Fedorov, Alexander; Yin, Qiangwei Physical Review Letters, Vol. 128, Issue 3 https://doi.org/10.1103/PhysRevLett.128.036402	journal	January 2022
Generalized Gradient Approximation Made Simple Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868 https://doi.org/10.1103/PhysRevLett.77.3865	journal	October 1996
New kagome prototype materials: discovery of KV 3 Sb 5 , RbV 3 Sb 5 , and CsV 3 Sb 5 Ortiz, Brenden R.; Gomes, Lídia C.; Morey, Jennifer R. Physical Review Materials, Vol. 3, Issue 9 https://doi.org/10.1103/PhysRevMaterials.3.094407	journal	September 2019
Superconductivity in the Z 2 kagome metal KV 3 Sb 5 Ortiz, Brenden R.; Sarte, Paul M.; Kenney, Eric M. Physical Review Materials, Vol. 5, Issue 3 https://doi.org/10.1103/PhysRevMaterials.5.034801	journal	March 2021
Fermi level tuning and double-dome superconductivity in the kagome metal CsV3Sb5−xSnx Oey, Yuzki M.; Ortiz, Brenden R.; Kaboudvand, Farnaz Physical Review Materials, Vol. 6, Issue 4 https://doi.org/10.1103/PhysRevMaterials.6.L041801	journal	April 2022
Doping evolution of superconductivity, charge order, and band topology in hole-doped topological kagome superconductors Cs(V1−xTix)3Sb5 Liu, Yixuan; Wang, Yuan; Cai, Yongqing Physical Review Materials, Vol. 7, Issue 6 https://doi.org/10.1103/PhysRevMaterials.7.064801	journal	June 2023

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