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  4. Probing the coupling between a doublon excitation and the charge-density wave in TaS2 by ultrafast optical spectroscopy
 
research article

Probing the coupling between a doublon excitation and the charge-density wave in TaS2 by ultrafast optical spectroscopy

Mann, Andreas  
•
Baldini, Edoardo  
•
Odeh, Ahmad
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2016
Physical Review B

Recently, the switching between the different charge-ordered phases of 1T-TaS2 has been probed by ultrafast techniques, revealing unexpected phenomena such as "hidden" metastable states and peculiar photoexcited charge patterns. Here, we apply broadband pump-probe spectroscopy with varying excitation energy to study the ultrafast optical properties of 1T-TaS2 in the visible regime. By scanning the excitation energy in the near-IR region we unravel the coupling between different charge excitations and the low-lying charge-density wave state. We find that the amplitude mode of the charge-density wave exhibits strong coupling to a long-lived doublon state that is photoinduced in the center of the star-shaped charge-ordered Ta clusters by the near-IR optical excitation.

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Type
research article
DOI
10.1103/PhysRevB.94.115122
Web of Science ID

WOS:000383234700002

Author(s)
Mann, Andreas  
Baldini, Edoardo  
Odeh, Ahmad
Magrez, Arnaud
Berger, Helmuth
Carbone, Fabrizio  
Date Issued

2016

Publisher

Amer Physical Soc

Published in
Physical Review B
Volume

94

Issue

11

Article Number

115122

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LUMES  
Available on Infoscience
October 18, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/130219
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