Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa

doi:10.1038/s41467-020-17261-x

	Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa
	Sessi, Paolo 1; Fan, Feng-Ren 2; Kuester, Felix 1; Manna, Kaustuv 2; Schroter, Niels B. M.3; Ji, Jing-Rong 1; Stolz, Samuel 4,5; Krieger, Jonas A.3,6,7; Pei, Ding 8; Kim, Timur K.9; Dudin, Pavel 9; Cacho, Cephise 9; Widmer, Roland 4; Borrmann, Horst 2; Shi, Wujun10 ; Chang, Kai 1,11; Sun, Yan 2; Felser, Claudia 2; Parkin, Stuart S. P.1
	2020-07-14
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	11 期号:1
发表状态	已发表
DOI	10.1038/s41467-020-17261-x
摘要	It has recently been proposed that combining chirality with topological band theory results in a totally new class of fermions. Understanding how these unconventional quasiparticles propagate and interact remains largely unexplored so far. Here, we use scanning tunneling microscopy to visualize the electronic properties of the prototypical chiral topological semimetal PdGa. We reveal chiral quantum interference patterns of opposite spiraling directions for the two PdGa enantiomers, a direct manifestation of the change of sign of their Chern number. Additionally, we demonstrate that PdGa remains topologically non-trivial over a large energy range, experimentally detecting Fermi arcs in an energy window of more than 1.6eV that is symmetrically centered around the Fermi level. These results are a consequence of the deep connection between chirality in real and reciprocal space in this class of materials, and, thereby, establish PdGa as an ideal topological chiral semimetal. Direct visualization of chiral effects in topological chiral semimetals remains elusive. Here, Sessi et al. demonstrate that quasiparticle scattering at impurities in the two enantiomers of PdGa gives rise to handedness dependent quantum interference patterns.
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收录类别	SCI ; SCIE
语种	英语
资助项目	Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)[314790414] ; European Research Council (ERC)[742068] ; Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter ct.qmat[EXC2147][39085490] ; Swiss National Science Foundation (SNF)[159690]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000550062200003
出版者	NATURE PUBLISHING GROUP
WOS关键词	MAJORANA FERMIONS
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/122689
专题	硬x射线自由电子激光装置项目物质科学与技术学院
通讯作者	Sessi, Paolo; Parkin, Stuart S. P.
作者单位	1.Max Planck Inst Microstruct Phys, D-06120 Halle, Germany 2.Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany 3.Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland 4.Swiss Fed Labs Mat Sci & Technol, Empa, CH-8600 Dubendorf, Switzerland 5.Ecole Polytech Fed Lausanne, Stn 3, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland 6.Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland 7.Swiss Fed Inst Technol, Lab Festkorperphys, CH-8093 Zurich, Switzerland 8.Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England 9.Diamond Light Source, Didcot OX110DE, Oxon, England 10.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201203, Peoples R China 11.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
推荐引用方式 GB/T 7714	Sessi, Paolo,Fan, Feng-Ren,Kuester, Felix,et al. Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa[J]. NATURE COMMUNICATIONS,2020,11(1).
APA	Sessi, Paolo.,Fan, Feng-Ren.,Kuester, Felix.,Manna, Kaustuv.,Schroter, Niels B. M..,...&Parkin, Stuart S. P..(2020).Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa.NATURE COMMUNICATIONS,11(1).
MLA	Sessi, Paolo,et al."Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa".NATURE COMMUNICATIONS 11.1(2020).