English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Multiple mobile excitons manifested as sidebands in metallic phase of TaSe3

Ma, J.-Z., Nie, S.-M., Gui, X., Naamneh, M., Jandke, J., Xi, C. Y., et al. (2020). Multiple mobile excitons manifested as sidebands in metallic phase of TaSe3.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0007-040E-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-040F-5
Genre: Paper

Files

show Files
hide Files
:
2009.07157.pdf (Preprint), 11MB
Name:
2009.07157.pdf
Description:
Downloaded from arxiv.org: 2020-09-16
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2020
Copyright Info:
© the Author(s)

Locators

show
hide
Locator:
https://arxiv.org/abs/2009.07157 (Preprint)
Description:
-

Creators

show
hide
 Creators:
Ma, J.-Z.1, Author
Nie, S.-M.1, Author
Gui, X.1, Author
Naamneh, M.1, Author
Jandke, J.1, Author
Xi, C. Y.1, Author
Zhang, J. L.1, Author
Shang, T.1, Author
Xiong, Y.M.1, Author
Kapon, I.1, Author
Kumar, N.1, Author
Soh, Y.1, Author
Gosalbezmartinez, D.1, Author
Yazyev, O.1, Author
Fan, W.H.1, Author
Plumb, N.1, Author
Radovic, M.1, Author
Hübener, H.2, 3, Author              
de Giovannini, U.2, 3, Author              
Sentef, M. A.3, 4, Author              
Song, W.-W.1, AuthorWang, Z.1, AuthorMudry, C.1, AuthorMuller, M.1, AuthorShi, M.1, Author more..
Affiliations:
1external, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Center for Free Electron Laser Science, ou_persistent22              
4Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              

Content

show
hide
Free keywords: -
 Abstract: Excitons are bound states between electrons and holes, whose charge neutrality and a priori itinerant nature make them interesting as potential transmitters of information. However, the demonstration of the mobility of such composite excitations has remained inaccessible to traditional optical experiments which only create and detect excitons with negligible momentum or group velocity. Here, we use angle-resolved photoemission spectroscopy (ARPES) to detect dispersing excitons in the quasi-one-dimensional metallic trichalcogenide TaSe3. While screening usually suppresses exciton formation in metals, the low density of conduction electrons, the low dimensionality, and two many-body effects in TaSe3 favor them. First, the conduction band is renormalized close to the Fermi surface, forming a band of heavy polarons. Second, the poorly screened interaction between a photo-induced valence hole and these polarons leads to various distinct excitonic bound states, which we interpret as intrachain and interchain excitons, and possibly even trions. The thresholds for the formation of a photohole together with an exciton show up in the form of unusual side bands in the ARPES spectra. They are nearly parallel to the bare valence band, but lie at lower excitation energies. Furthermore, we find that the energy separation of the side bands can be tuned by surface doping.

Details

show
hide
Language(s): eng - English
 Dates: 2020-09-15
 Publication Status: Published online
 Pages: 25
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2009.07157
 Degree: -

Event

show

Legal Case

show

Project information

show

Source

show