TY - JOUR
T1 - Possible star-of-David pattern charge density wave with additional modulation in the kagome superconductor CsV3Sb5
AU - Luo, J.
AU - Zhao, Z.
AU - Zhou, Y. Z.
AU - Yang, J.
AU - Fang, A. F.
AU - Yang, H. T.
AU - Gao, H. J.
AU - Zhou, R.
AU - Zheng, Guo qing
N1 - Funding Information:
The authors thank Kun Jiang and Hui Chen for valuable discussions. This work was supported by the National Natural Science Foundation of China (Grant Nos. 11974405, Nos. 61888102, Nos. 51771224 and Nos. 11904023), the National Key Research and Development Projects of China (Grant Nos. 2017YFA0302904, Nos. 2018YFA0305800 and 2019YFA0308500) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDB33010100 and Nos. XDB33030100).This work was supported by the Synergic Extreme Condition User Facility.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - AV3Sb5 (A = K, Rb, Cs) is a novel kagome superconductor coexisting with the charge density wave (CDW) order. Identifying the structure of the CDW order is crucial for understanding the exotic normal state and superconductivity in this system. Here, we report 51V nuclear magnetic resonance (NMR) and 121/123Sb nuclear quadrupole resonance (NQR) studies on kagome-metal CsV3Sb5. Below the CDW transition temperature TCDW ~ 98 K, an abrupt change of spectra was observed, indicating that the transition is of the first order. By further analyzing the spectra, we find that the CDW order is commensurate. And most remarkably, the obtained experimental results suggest that the charge modulation of the CDW order is of star-of-David pattern and accompanied by an additional charge modulation in bulk below T* ~ 40 K. Our results revealing the unconventional CDW order provide new insights into AV3Sb5.
AB - AV3Sb5 (A = K, Rb, Cs) is a novel kagome superconductor coexisting with the charge density wave (CDW) order. Identifying the structure of the CDW order is crucial for understanding the exotic normal state and superconductivity in this system. Here, we report 51V nuclear magnetic resonance (NMR) and 121/123Sb nuclear quadrupole resonance (NQR) studies on kagome-metal CsV3Sb5. Below the CDW transition temperature TCDW ~ 98 K, an abrupt change of spectra was observed, indicating that the transition is of the first order. By further analyzing the spectra, we find that the CDW order is commensurate. And most remarkably, the obtained experimental results suggest that the charge modulation of the CDW order is of star-of-David pattern and accompanied by an additional charge modulation in bulk below T* ~ 40 K. Our results revealing the unconventional CDW order provide new insights into AV3Sb5.
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U2 - 10.1038/s41535-022-00437-7
DO - 10.1038/s41535-022-00437-7
M3 - Article
AN - SCOPUS:85126773280
SN - 2397-4648
VL - 7
JO - npj Quantum Materials
JF - npj Quantum Materials
IS - 1
M1 - 30
ER -