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Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3

文献类型：期刊论文

作者Ma, Junzhang1,2,3; Nie, Simin4; Gui, Xin5; Naamneh, Muntaser2; Jandke, Jasmin2; Xi, Chuanying6; Zhang, Jinglei6; Shang, Tian7; Xiong, Yimin6; Kapon, Itzik8
刊名NATURE MATERIALS
出版日期2022-02-21
ISSN号1476-1122
DOI10.1038/s41563-022-01201-9
通讯作者Ma, Junzhang(junzhama@cityu.edu.hk) ; Mueller, Markus(markus.mueller@psi.ch) ; Shi, Ming(ming.shi@psi.ch)
英文摘要Charge neutrality and their expected itinerant nature makes excitons potential transmitters of information. However, exciton mobility remains inaccessible to traditional optical experiments that only create and detect excitons with negligible momentum. Here, using angle-resolved photoemission spectroscopy, we detect dispersing excitons in the quasi-one-dimensional metallic trichalcogenide, TaSe3. The low density of conduction electrons and the low dimensionality in TaSe3 combined with a polaronic renormalization of the conduction band and the poorly screened interaction between these polarons and photo-induced valence holes leads to various excitonic bound states that we interpret as intrachain and interchain excitons, and possibly trions. The thresholds for the formation of a photo-hole together with an exciton appear as side valence bands with dispersions nearly parallel to the main valence band, but shifted to lower excitation energies. The energy separation between side and main valence bands can be controlled by surface doping, enabling the tuning of certain exciton properties. Mobile excitons in metals have been elusive, as screening usually suppresses their formation. Here, the authors demonstrate such mobile bound states in quasi-one-dimensional metallic TaSe3, taking advantage of its low dimensionality and carrier density.
WOS关键词CHARGE-DENSITY-WAVE ; TRANSITION ; SUPERCONDUCTIVITY
资助项目Sino-Swiss Science and Technology Cooperation[IZLCZ2-170075] ; Swiss National Science Foundation[200021_188413] ; Swiss National Science Foundation[200021_182695] ; Swiss National Science Foundation[200021_166271] ; Swiss National Science Foundation[200021_159678] ; NCCR MARVEL - Swiss National Science Foundation ; European Union[701647] ; City University of Hong Kong[9610489] ; National Natural Science Foundation of China[12104379] ; Shenzhen Research Institute, City University of Hong Kong ; Deutsche Forschungsgemeinschaft[SE 2558/2] ; Excellence Program of Hefei Science Center CAS[2021HSC-UE011] ; Beckman Young Investigator Programme - Arnold and Mabel Beckman Foundation ; US NSF[DMR-1944965] ; US Department of Energy Division of Basic Energy Sciences[DG-FG02-98ER45706]
WOS研究方向Chemistry ; Materials Science ; Physics
语种英语
出版者NATURE PORTFOLIO
WOS记录号WOS:000758972100001
资助机构Sino-Swiss Science and Technology Cooperation ; Swiss National Science Foundation ; NCCR MARVEL - Swiss National Science Foundation ; European Union ; City University of Hong Kong ; National Natural Science Foundation of China ; Shenzhen Research Institute, City University of Hong Kong ; Deutsche Forschungsgemeinschaft ; Excellence Program of Hefei Science Center CAS ; Beckman Young Investigator Programme - Arnold and Mabel Beckman Foundation ; US NSF ; US Department of Energy Division of Basic Energy Sciences
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/127784]  
专题中国科学院合肥物质科学研究院
通讯作者Ma, Junzhang; Mueller, Markus; Shi, Ming
作者单位1.City Univ Hong Kong, Dept Phys, Kowloon, Hong Kong, Peoples R China
2.Paul Scherrer Inst, Photon Sci Div, Villigen, Switzerland
3.City Univ Hong Kong, Shenzhen Res Inst, Shenzhen, Peoples R China
4.Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
5.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
6.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, HFIPS, Hefei, Peoples R China
7.East China Normal Univ, Sch Phys & Elect Sci, Key Lab Polar Mat & Devices, Shanghai, Peoples R China
8.Univ Geneva, Dept Quantum Matter Phys, Geneva, Switzerland
9.Paul Scherrer Inst, Villigen, Switzerland
10.Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland
推荐引用方式
GB/T 7714		 Ma, Junzhang,Nie, Simin,Gui, Xin,et al. Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3[J]. NATURE MATERIALS,2022.
APA Ma, Junzhang.,Nie, Simin.,Gui, Xin.,Naamneh, Muntaser.,Jandke, Jasmin.,...&Shi, Ming.(2022).Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3.NATURE MATERIALS.
MLA Ma, Junzhang,et al."Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3".NATURE MATERIALS (2022).

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来源：合肥物质科学研究院

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