Unconventional chiral charge order in kagome superconductor KV3Sb5.
Yu-Xiao Jiang,Jiaxin Yin,M. Michael Denner,Nana Shumiya,Brenden R. Ortiz,Gang Xu,Zurab Guguchia,Junyi He,Shafayat Hossain,Xiaoxiong Liu,Jacob Ruff,Linus Kautzsch,Songtian S. Zhang,Guoqing Chang,Ilya Belopolski,Qi Zhang,Tyler A. Cochran,Daniel Multer,Maksim Litskevich,Zijia Cheng,Xian P. Yang,Ziqiang Wang,Ronny Thomale,Titus Neupert,Stephen D. Wilson,M. Zahid Hasan +25 more
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TLDR
In this paper, the authors used high-resolution scanning tunnelling microscopy to discover an unconventional chiral charge order in a kagome material, KV3Sb5, with both a topological band structure and a superconducting ground state.Abstract:
Intertwining quantum order and non-trivial topology is at the frontier of condensed matter physics1–4. A charge-density-wave-like order with orbital currents has been proposed for achieving the quantum anomalous Hall effect5,6 in topological materials and for the hidden phase in cuprate high-temperature superconductors7,8. However, the experimental realization of such an order is challenging. Here we use high-resolution scanning tunnelling microscopy to discover an unconventional chiral charge order in a kagome material, KV3Sb5, with both a topological band structure and a superconducting ground state. Through both topography and spectroscopic imaging, we observe a robust 2 × 2 superlattice. Spectroscopically, an energy gap opens at the Fermi level, across which the 2 × 2 charge modulation exhibits an intensity reversal in real space, signalling charge ordering. At the impurity-pinning-free region, the strength of intrinsic charge modulations further exhibits chiral anisotropy with unusual magnetic field response. Theoretical analysis of our experiments suggests a tantalizing unconventional chiral charge density wave in the frustrated kagome lattice, which can not only lead to a large anomalous Hall effect with orbital magnetism, but also be a precursor of unconventional superconductivity. An unconventional chiral charge order is observed in a kagome superconductor by scanning tunnelling microscopy. This charge order has unusual magnetic tunability and intertwines with electronic topology.read more
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Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
Hui Chen,Haitao Yang,Bin Hu,Zhen Zhao,Jie Yuan,Yuqing Xing,Guojian Qian,Zihao Huang,Geng Li,Yuhan Ye,Qiangwei Yin,Chunsheng Gong,Zhijun Tu,Hechang Lei,Shen Ma,Hua Zhang,Shunli Ni,Hengxin Tan,Chengmin Shen,Xiaoli Dong,Binghai Yan,Ziqiang Wang,Hong-Jun Gao +22 more
TL;DR: In this paper, the vanadium-based kagome lattice CsV3Sb5 was observed to exhibit a V-shaped pairing gap about 0.5 meV below a transition temperature Tc about 2.3 K.
Journal ArticleDOI
Concurrence of anomalous Hall effect and charge density wave in a superconducting topological kagome metal
Fanghang Yu,Tao Wu,Zhen-Hua Wang,B. Lei,W. Z. Zhuo,J. J. Ying,Xianhui Chen,Xianhui Chen,Xianhui Chen +8 more
TL;DR: In this paper, the anomalous Hall effect (AHE) typically occurs in ferromagnetic materials but is not expected in conventional superconductors, and the authors find a giant AHE in the kagome superconductor CsV${}_{3}$Sb${}-5}$.
Journal ArticleDOI
Cascade of correlated electron states in the kagome superconductor CsV3Sb5.
He Zhao,Hong Li,Brenden R. Ortiz,Samuel M. L. Teicher,Takamori Park,Mengxing Ye,Ziqiang Wang,Leon Balents,Leon Balents,Stephen D. Wilson,Ilija Zeljkovic +10 more
TL;DR: In this paper, a temperature-dependent cascade of different symmetry-broken electronic states in a new kagome superconductor, CsV3Sb5, was discovered using spectroscopic imaging scanning tunnelling microscopy.
Journal ArticleDOI
Charge-density-wave-driven electronic nematicity in a kagome superconductor
L. P. Nie,Kuanglv Sun,Wanru Ma,D. Song,Lixuan Zheng,Z. Liang,P. Wu,Fanghang Yu,Jian Li,Min Shan,D. Zhao,Shunjiao Li,B. L. Kang,Yanli Zhou,Kai Liu,Ziji Xiang,J. J. Ying,Zhenyu Wang,Tao Wu,Xianhui Chen +19 more
Journal ArticleDOI
Chiral flux phase in the Kagome superconductor AV3Sb5
TL;DR: In this article, the authors show that the topological charge density wave phase in the quasi-2D Kagome superconductor AV3Sb5 is a chiral flux phase.
References
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