Junzhang Ma^1,2,3*, Simin Nie⁴, Xin Gui⁵, Muntaser Naamneh², Jasmin Jandke², Chuanying Xi⁶, Jinglei Zhang⁶, Tian Shang⁷, Yimin Xiong⁶, Itzik Kapon⁸, Neeraj Kumar⁹, Yeong Soh⁹, Daniel Gosálbez-Martínez¹⁰, Oleg V. Yazyev¹⁰, Wenhui Fan^11,12, Hannes Hübener¹³, Umberto De Giovannini¹³, Nicholas Clark Plumb², Milan Radovic², Michael Andreas Sentef¹³, Weiwei Xie¹⁴, Zhijun Wang^11,12, Christopher Mudry^10,15, Markus Müller^15*, Ming Shi^2*

1 Department of Physics, City University of Hong Kong, Kowloon, Hong Kong, China

2 Photon Science Division, Paul Scherrer Institute, Villigen, Switzerland

3 City University of Hong Kong Shenzhen Research Institute, Shenzhen, China

4 Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA

5 Department of Chemistry, Princeton University, Princeton, NJ, USA

6 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, CAS

7 Key Laboratory of Polar Materials and Devices, School of Physics and Electronic Science, East China Normal University, Shanghai, China

8 Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland

9 Paul Scherrer Institute, Villigen, Switzerland

10 Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

11 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China

12 University of Chinese Academy of Sciences, Beijing, China

13 Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany

14 Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, USA

15 Condensed Matter Theory Group, Paul Scherrer Institute, Villigen, Switzerland

* Corresponding authors emails: junzhama@cityu.edu.hk, Markus.Mueller@psi.ch, ming.shi@psi.ch

DOI10.24435/materialscloud:sr-aa [version v1]

Publication date: Feb 11, 2022

How to cite this record

Junzhang Ma, Simin Nie, Xin Gui, Muntaser Naamneh, Jasmin Jandke, Chuanying Xi, Jinglei Zhang, Tian Shang, Yimin Xiong, Itzik Kapon, Neeraj Kumar, Yeong Soh, Daniel Gosálbez-Martínez, Oleg V. Yazyev, Wenhui Fan, Hannes Hübener, Umberto De Giovannini, Nicholas Clark Plumb, Milan Radovic, Michael Andreas Sentef, Weiwei Xie, Zhijun Wang, Christopher Mudry, Markus Müller, Ming Shi, Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe₃, Materials Cloud Archive 2022.26 (2022), doi: 10.24435/materialscloud:sr-aa.

Description

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 quasi-one-dimensional metallic trichalcogenide, TaSe₃. The low density of conduction electrons and 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. This document contains the raw data of this project.

Materials Cloud sections using this data

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File name	Size	Description
Fig1.zip MD5md5:14cf64f5d8bf08eefc29d2011c1d45c3	3.9 MiB	The data in Fig.1 of the related manuscript.
Fig2.zip MD5md5:016114d106d0c401d0698ba6bcf1ba56	760.6 KiB	The data in Fig.2 of the related manuscript.
Fig3.zip MD5md5:f7b3802b444f419ce1429722da3cc2c1	2.1 MiB	The data in Fig.3 of the related manuscript.
readme.rtf MD5md5:bdc69a36fd9a69d62c424b023e47ce4c	1006 Bytes	Read me

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Keywords

Mobile excitons in metal 1D metallic trichalcogennide interchain excitons and trions Dispersive bands from excitons ARPES MARVEL/DD6