A density-wave-like transition in the polycrystalline V3Sb2 sample with bilayer kagome lattice

doi:10.1088/1674-1056/ac4227

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 17106-017106.doi: 10.1088/1674-1056/ac4227

所属专题： SPECIAL TOPIC — Superconductivity in vanadium-based kagome materials

A density-wave-like transition in the polycrystalline V₃Sb₂ sample with bilayer kagome lattice

Ningning Wang(王宁宁)^1,2, Yuhao Gu(顾雨豪)^1,2, M. A. McGuire³, Jiaqiang Yan³, Lifen Shi(石利粉)^1,2, Qi Cui(崔琦)^1,2, Keyu Chen(陈科宇)^1,2, Yuxin Wang(王郁欣)^1,2, Hua Zhang(张华)^1,2, Huaixin Yang(杨槐馨)^1,2, Xiaoli Dong(董晓莉)^1,2, Kun Jiang(蒋坤)^1,2, Jiangping Hu(胡江平)^1,2, Bosen Wang(王铂森)^1,2, Jianping Sun(孙建平)^1,2, and Jinguang Cheng(程金光)^1,2,†

1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

收稿日期:2021-10-29 修回日期:2021-12-01 接受日期:2021-12-11 出版日期:2021-12-03 发布日期:2021-12-30
通讯作者: Jinguang Cheng E-mail:jgcheng@iphy.ac.cn
基金资助:
This work is supported by the National Key R&D Program of China (Grant Nos. 2018YFA0305700 and 2018YFA0305800), the National Natural Science Foundation of China (Grant Nos. 12025408, 11874400, 11834016, 11921004, 11888101, and 11904391), the Beijing Natural Science Foundation, China (Grant No. Z190008), the Strategic Priority Research Program and Key Research Program of Frontier Sciences of Chinese Academy of Sciences (CAS) (Grant Nos. XDB25000000, XDB33000000 and QYZDBSSW-SLH013), and the CAS Interdisciplinary Innovation Team (Grant No. JCTD-201-01). Work at Oak Ridge National Laboratory was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.

A density-wave-like transition in the polycrystalline V₃Sb₂ sample with bilayer kagome lattice

1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

Received:2021-10-29 Revised:2021-12-01 Accepted:2021-12-11 Online:2021-12-03 Published:2021-12-30
Contact: Jinguang Cheng E-mail:jgcheng@iphy.ac.cn
Supported by:
This work is supported by the National Key R&D Program of China (Grant Nos. 2018YFA0305700 and 2018YFA0305800), the National Natural Science Foundation of China (Grant Nos. 12025408, 11874400, 11834016, 11921004, 11888101, and 11904391), the Beijing Natural Science Foundation, China (Grant No. Z190008), the Strategic Priority Research Program and Key Research Program of Frontier Sciences of Chinese Academy of Sciences (CAS) (Grant Nos. XDB25000000, XDB33000000 and QYZDBSSW-SLH013), and the CAS Interdisciplinary Innovation Team (Grant No. JCTD-201-01). Work at Oak Ridge National Laboratory was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.

摘要/Abstract

摘要： Recently, transition-metal-based kagome metals have aroused much research interest as a novel platform to explore exotic topological quantum phenomena. Here we report on the synthesis, structure, and physical properties of a bilayer kagome lattice compound V₃Sb₂. The polycrystalline V₃Sb₂ samples were synthesized by conventional solid-state-reaction method in a sealed quartz tube at temperatures below 850 ℃. Measurements of magnetic susceptibility and resistivity revealed consistently a density-wave-like transition at T_dw ≈ 160 K with a large thermal hysteresis, even though some sample-dependent behaviors were observed presumably due to the different preparation conditions. Upon cooling through T_dw, no strong anomaly in lattice parameters and no indication of symmetry lowering were detected in powder x-ray diffraction measurements. This transition can be suppressed completely by applying hydrostatic pressures of about 1.8 GPa, around which no sign of superconductivity was observed down to 1.5 K. Specific-heat measurements revealed a relatively large Sommerfeld coefficient γ = 18.5 mJ·mol^-1·K^-2, confirming the metallic ground state with moderate electronic correlations. Density functional theory calculations indicate that V₃Sb₂ shows a non-trivial topological crystalline property. Thus, our study makes V₃Sb₂ a new candidate of metallic kagome compound to study the interplay between density-wave-order, nontrivial band topology, and possible superconductivity.

关键词: V₃Sb₂, kagome metal, charge density wave, pressure effect

Abstract: Recently, transition-metal-based kagome metals have aroused much research interest as a novel platform to explore exotic topological quantum phenomena. Here we report on the synthesis, structure, and physical properties of a bilayer kagome lattice compound V₃Sb₂. The polycrystalline V₃Sb₂ samples were synthesized by conventional solid-state-reaction method in a sealed quartz tube at temperatures below 850 ℃. Measurements of magnetic susceptibility and resistivity revealed consistently a density-wave-like transition at T_dw ≈ 160 K with a large thermal hysteresis, even though some sample-dependent behaviors were observed presumably due to the different preparation conditions. Upon cooling through T_dw, no strong anomaly in lattice parameters and no indication of symmetry lowering were detected in powder x-ray diffraction measurements. This transition can be suppressed completely by applying hydrostatic pressures of about 1.8 GPa, around which no sign of superconductivity was observed down to 1.5 K. Specific-heat measurements revealed a relatively large Sommerfeld coefficient γ = 18.5 mJ·mol^-1·K^-2, confirming the metallic ground state with moderate electronic correlations. Density functional theory calculations indicate that V₃Sb₂ shows a non-trivial topological crystalline property. Thus, our study makes V₃Sb₂ a new candidate of metallic kagome compound to study the interplay between density-wave-order, nontrivial band topology, and possible superconductivity.

Key words: V₃Sb₂, kagome metal, charge density wave, pressure effect

中图分类号: (Metal-insulator transitions and other electronic transitions)

71.30.+h

71.20.Be (Transition metals and alloys) 74.40.Kb (Quantum critical phenomena) 74.62.Fj (Effects of pressure)

Ningning Wang(王宁宁), Yuhao Gu(顾雨豪), M. A. McGuire, Jiaqiang Yan, Lifen Shi(石利粉), Qi Cui(崔琦), Keyu Chen(陈科宇), Yuxin Wang(王郁欣), Hua Zhang(张华), Huaixin Yang(杨槐馨), Xiaoli Dong(董晓莉), Kun Jiang(蒋坤), Jiangping Hu(胡江平), Bosen Wang(王铂森), Jianping Sun(孙建平), and Jinguang Cheng(程金光). A density-wave-like transition in the polycrystalline V₃Sb₂ sample with bilayer kagome lattice[J]. 中国物理B, 2022, 31(1): 17106-017106.

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A density-wave-like transition in the polycrystalline V₃Sb₂ sample with bilayer kagome lattice

A density-wave-like transition in the polycrystalline V₃Sb₂ sample with bilayer kagome lattice

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