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No indication of chiral flux current in the topological kagome metal CsV$_{3}$Sb$_{5}$
Huazhou Li,Siyuan Wan,Han Li,Qing Li,Qiangqiang Gu,Huan Yang,Yongkai Li,Zhiwei Wang,Yugui Yao,Hai-Hu Wen +9 more
TLDR
In this paper, the authors reported scanning tunneling measurements by using spin polarized tips, and they did not reveal any trace of the chiral flux current phase in CsV$_3$Sb$_5$.Abstract:
Compounds with kagome lattice usually host many exotic quantum states, including the quantum spin liquid, non-trivial topological Dirac bands and a strongly renormalized flat band, etc. Recently an interesting vanadium based kagome family $A$V$_{3}$Sb$_{5}$ ($A$ = K, Rb, or Cs) was discovered, and these materials exhibit multiple interesting properties, including unconventional saddle-point driven charge density wave (CDW) state, superconductivity, etc. Furthermore, some experiments show anomalous Hall effect which inspires that there might be some chiral flux current states. Here we report scanning tunneling measurements by using spin polarized tips. Although we have observed clearly the $2\times2$ and $1\times4$ CDW orders, the well-designed experiments with refined spin polarized tips do not reveal any trace of the chiral flux current phase in CsV$_3$Sb$_5$. Thus it remains debatable whether this state really exists in CsV$_3$Sb$_5$ and we may need additional scenario to explain the anomalous Hall effect.read more
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Doping and two distinct phases in strong-coupling kagome superconductors
Haitao Yang,Yuhang Zhang,Zihao Huang,Zhen Zhao,Jinan Shi,Guojian Qian,Bin Hu,Zouyouwei Lu,Hua Zhang,Chengmin Shen,Xiao Lin,Ziqiang Wang,Stephen J. Pennycook,Hui Chen,Xiaoli Dong,Wu Zhou,Hong-Jun Gao +16 more
TL;DR: In this article, the synthesis of Ti-doped CsV3Sb5 single crystals with controllable carrier doping concentration was reported, and the Ti atoms directly substitute for V in the vanadium kagome layers.
References
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Journal ArticleDOI
Electronic correlations in the normal state of the kagome superconductor KV 3 Sb 5
TL;DR: In this paper, the authors investigated the correlated electronic structure and magnetic properties of the kagome-lattice materials in the normal state and showed that these materials are good metals with weak local correlations.
Journal ArticleDOI
Anisotropic superconducting properties of Kagome metal CsV3Sb5
Shunli Ni,Sheng Ma,Yuhang Zhang,Jie Yuan,Haitao Yang,Zouyouwei Lu,N. L. Wang,Jianping Sun,Zhen Zhao,Dong Li,Shaobo Liu,Hua Zhang,Hui Chen,Kui Jin,Jinguang Cheng,Li Yu,Fang Zhou,Xiaoli Dong,Jiangping Hu,Hong-Jun Gao,Zhongxian Zhao +20 more
TL;DR: In this article, the superconducting and mixed state properties of high-quality CsV3Sb5 single crystals with Tc ~ 35 K were systematically measured and it was found that the upper critical field Hc2(T) exhibits a large anisotropic ratio of Hc 2^(ab)/Hc2^(c) ~ 9 at zero temperature and fitting its temperature dependence requires a minimum two-band effective model.
Journal ArticleDOI
Localized spin-orbit polaron in magnetic Weyl semimetal Co3Sn2S2
Yuqing Xing,Jianlei Shen,Hui Chen,Li Huang,Yuxiang Gao,Qi Zheng,Yu-Yang Zhang,Geng Li,Bin Hu,Guojian Qian,Lu Cao,Xianli Zhang,Peng Fan,Ruisong Ma,Qi Wang,Qiangwei Yin,Hechang Lei,Wei Ji,Shixuan Du,Haitao Yang,Wenhong Wang,Chengmin Shen,Xiao Lin,Enke Liu,Bao-gen Shen,Ziqiang Wang,Hong-Jun Gao +26 more
TL;DR: In this paper, localized spin-orbit polarons (SOPs) with three-fold rotation symmetry nucleated around single S-vacancies in Co3Sn2S2 were found.
Journal ArticleDOI
Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV3Sb5 (A=Rb,Cs)
Haoxiang Li,Tiantian Zhang,Yun-Yi Pai,Claire E. Marvinney,Ayman Said,T. Yilmaz,Qiangwei Yin,Chunsheng Gong,Zhijun Tu,Elio Vescovo,Robert G. Moore,Shuichi Murakami,Hechang Lei,Ho Nyung Lee,Benjamin J. Lawrie,Hu Miao +15 more
TL;DR: In this paper, the authors demonstrate a 3D charge density wave (CDW) with 2*2*2 superstructure in (Rb,Cs)V3Sb5.
Journal ArticleDOI
Spin-orbit quantum impurity in a topological magnet
Jiaxin Yin,Nana Shumiya,Yu-Xiao Jiang,Huibin Zhou,Gennevieve Macam,Hano Omar Mohammad Sura,Songtian S. Zhang,Zijia Cheng,Zurab Guguchia,Zurab Guguchia,Yangmu Li,Qi Wang,Maksim Litskevich,Ilya Belopolski,Xian P. Yang,Tyler A. Cochran,Guoqing Chang,Qi Zhang,Zhi Quan Huang,Feng-Chuan Chuang,Hsin Lin,Hechang Lei,Brian M. Andersen,Ziqiang Wang,Shuang Jia,M. Zahid Hasan +25 more
TL;DR: In this paper, a spin-polarized scanning tunneling microscopy/spectroscopy (STM/S) was used to study the engineered quantum impurity in a topological magnet Co3Sn2S2.