Discovery of conjoined charge density waves in the kagome superconductor CsV3Sb5

Journal Article · 25 October 2022 · Nature Communications

DOI: https://doi.org/10.1038/s41467-022-33995-2 · OSTI ID:1894711

Li, Haoxiang ; Fabbris, G. ; Said, A. H.; Sun, J. P. ; Jiang, Yu-Xiao; Yin, J. -X. ; Pai, Yun-Yi ; Yoon, Sangmoon; Lupini, Andrew R. ; Nelson, C. S. ; Yin, Q. W.; Gong, C. S.; Tu, Z. J.; Lei, H. C. ; Cheng, J. -G. ; Hasan, M. Z. ; Wang, Ziqiang ; Yan, Binghai ; Thomale, R. ; Lee, H. N. ; Miao, H.

Abstract The electronic instabilities in CsV ₃ Sb ₅ are believed to originate from the V 3 d -electrons on the kagome plane, however the role of Sb 5 p -electrons for 3-dimensional orders is largely unexplored. Here, using resonant tender X-ray scattering and high-pressure X-ray scattering, we report a rare realization of conjoined charge density waves (CDWs) in CsV ₃ Sb ₅ , where a 2 × 2 × 1 CDW in the kagome sublattice and a Sb 5 p -electron assisted 2 × 2 × 2 CDW coexist. At ambient pressure, we discover a resonant enhancement on Sb L ₁ -edge (2 s →5 p ) at the 2 × 2 × 2 CDW wavevectors. The resonance, however, is absent at the 2 × 2 × 1 CDW wavevectors. Applying hydrostatic pressure, CDW transition temperatures are separated, where the 2 × 2 × 2 CDW emerges 4 K above the 2 × 2 × 1 CDW at 1 GPa. These observations demonstrate that symmetry-breaking phases in CsV ₃ Sb ₅ go beyond the minimal framework of kagome electronic bands near van Hove filling.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Brookhaven National Laboratory (BNL), Upton, NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: Beijing Natural Science Foundation; Deutsche Forschungsgemeinschaft (DFG); European Research Council (ERC); Gordon and Betty Moore Foundation; Ministry of Science and Technology of the People’s Republic of China (MOST); National Natural Science Foundation of China (NSFC); Research Corporation for Science Advancement; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter
• Grant/Contract Number: AC02-06CH11357; AC05-00OR22725; FG02-05ER46200; FG02-99ER45747; SC0012704
• OSTI ID: 1894711
• Report Number(s): BNL-223943-2023-JAAM; 6348; PII: 33995
• Journal Information: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723
• Publisher: Nature Publishing GroupCopyright Statement
• Country of Publication: United Kingdom
• Language: English