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  Dynamics of electronic states in the insulating intermediate surface phase of 1T−TaS2

Dong, J., Qi, W., Shin, D., Cario, L., Chen, Z., Grasset, R., et al. (2023). Dynamics of electronic states in the insulating intermediate surface phase of 1T−TaS2. Physical Review B, 108(15): 155145. doi:10.1103/PhysRevB.108.155145.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-74F8-9 Version Permalink: https://hdl.handle.net/21.11116/0000-000D-DB21-7
Genre: Journal Article

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PhysRevB.108.155145.pdf (Publisher version), 4MB
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© American Physical Society
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https://arxiv.org/abs/2307.06444 (Preprint)
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https://doi.org/10.1103/PhysRevB.108.155145 (Publisher version)
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 Creators:
Dong, J.1, Author
Qi, W.1, Author
Shin, D.2, 3, 4, Author           
Cario, L.5, Author
Chen, Z.6, Author
Grasset, R.1, Author
Boschetto, D.7, Author
Weis, M.7, 8, Author
Lample, P.7, 8, Author
Pastor, E.9, Author
Ritschel, T.10, Author
Marsi, M.6, Author
Taleb, A.11, Author
Park, N.12, Author
Rubio, A.3, 4, Author           
Papalazarou, E.6, Author
Perfetti, L.1, Author
Affiliations:
1Laboratoire des Solides Irradiés, CEA/DRF/lRAMIS, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, ou_persistent22              
2Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), ou_persistent22              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4Center for Free-Electron Laser Science, ou_persistent22              
5Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, ou_persistent22              
6Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, ou_persistent22              
7LOA, Laboratoire d’Optique Appliquée, CNRS, Ecole Polytechnique, ENSTA Paris, Institut Polytechnique de Paris, ou_persistent22              
8Université Paris-Saclay, CEA, CNRS, LIDYL, ou_persistent22              
9Université de Rennes, CNRS, Institut de Physique de Rennes (IPR) – UMR 6251, ou_persistent22              
10Instut für Festkörper- und Materialphysik, Technische Universität Dresden, ou_persistent22              
11Synchrotron SOLEIL, ou_persistent22              
12Department of Physics, Ulsan National Institute of Science and Technology (UNIST), ou_persistent22              

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 Abstract: This article reports a comparative study of bulk and surface properties in the transition metal dichalcogenide 1T−TaS2. When heating the sample, the surface displays an intermediate insulating phase that persists for ∼10 K on top of a metallic bulk. The weaker screening of Coulomb repulsion and a stiffer charge density wave (CDW) explain such resilience of a correlated insulator in the topmost layers. Both time-resolved angle-resolved photoelectron spectroscopy and transient reflectivity are employed to investigate the dynamics of electrons and CDW collective motion. It follows that the amplitude mode is always stiffer at the surface and displays variable coupling to the Mott-Peierls band, stronger in the low-temperature phase and weaker in the intermediate one.

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Language(s): eng - English
 Dates: 2023-09-182023-07-222023-10-092023-10-262023-10-15
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2307.06444
DOI: 10.1103/PhysRevB.108.155145
 Degree: -

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Project name : R.G. acknowledges the financial support by “Investissements d'Avenir” LabEx PALM (Grant No. ANR-10-LABX-0039-PALM) and T.R. acknowledges financial support by the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat (EXC 2147, Project ID 390858490).
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 108 (15) Sequence Number: 155145 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008