Coexistence of trihexagonal and star-of-David pattern in the charge density wave of the kagome superconductor AV3Sb5

doi:10.1103/PhysRevB.106.L241106

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	Coexistence of trihexagonal and star-of-David pattern in the charge density wave of the kagome superconductor AV3Sb5
	Hu, Yong ; Wu, Xianxin 5; Ortiz, Brenden R.; Han, Xinloong 3; Plumb, Nicholas C.; Wilson, Stephen D.; Schnyder, Andreas P.; Shi, Ming
刊名	PHYSICAL REVIEW B
	2022
卷号	106 期号:24 页码:L241106
关键词	TOTAL-ENERGY CALCULATIONS LIQUID GROUND-STATE
ISSN号	2469-9950
DOI	10.1103/PhysRevB.106.L241106
英文摘要	The recently discovered layered kagome metals AV3Sb5 (A = K, Rb, Cs) have attracted much attention because of their unique combination of superconductivity, charge density wave (CDW) order, and nontrivial band topology. The CDW order with an in-plane 2x2 reconstruction is found to exhibit exotic properties, such as time-reversal symmetry breaking and rotational symmetry breaking. However, the nature of the CDW, including its dimensionality, structural pattern, and effect on electronic structure, remains elusive despite intense research efforts. Here, we present a comprehensive study on the electronic structure of AV3Sb5 by combining polarization-and temperature-dependent angle-resolved photoemission spectroscopy with density-functional theory calculations. Apart from the energy shift of van Hove singularities, we observe double-band splittings for V d-orbital bands in the CDW phase, which provide essential information for revealing the dimensionality and pattern of the CDW order. Our calculations show that three-dimensional CDW orders containing stacking of star-of-David and trihexagonal patterns along the c axis can quantitatively reproduce the experimental features. The characteristic splittings from the two patterns can be experimentally extracted and they are quantitatively consistent with calculations, clearly demonstrating intrinsic coexistence of the two patterns in the CDW order. These results provide crucial insights into the nature and distortion pattern of the CDW order, and its signature in the electronic structure, thereby laying down the basis for a substantiated understanding of the exotic properties in the family of AV3Sb5 kagome metals.
学科主题	Materials Science ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27699]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany 2.Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing 100049, Peoples R China 3.Ortiz, Brenden R.; Wilson, Stephen D.] Univ Calif Santa Barbara, Mat Dept, Santa Barbara, CA 93106 USA 4.Paul Scherrer Inst, Photon Sci Div, CH-5232 Villigen, Switzerland 5.Wu, Xianxin; Schnyder, Andreas P.] Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hu, Yong,Wu, Xianxin,Ortiz, Brenden R.,et al. Coexistence of trihexagonal and star-of-David pattern in the charge density wave of the kagome superconductor AV3Sb5[J]. PHYSICAL REVIEW B,2022,106(24):L241106.
APA	Hu, Yong.,Wu, Xianxin.,Ortiz, Brenden R..,Han, Xinloong.,Plumb, Nicholas C..,...&Shi, Ming.(2022).Coexistence of trihexagonal and star-of-David pattern in the charge density wave of the kagome superconductor AV3Sb5.PHYSICAL REVIEW B,106(24),L241106.
MLA	Hu, Yong,et al."Coexistence of trihexagonal and star-of-David pattern in the charge density wave of the kagome superconductor AV3Sb5".PHYSICAL REVIEW B 106.24(2022):L241106.