Stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 probed with MeV ultrafast electron diffraction
Abstract
Transitions between different charge density wave (CDW) states in quasi-two-dimensional materials may be accompanied also by changes in the inter-layer stacking of the CDW. Using MeV ultrafast electron diffraction, the out-of-plane stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 is investigated for the first time. From the intensity of the CDW satellites aligned around the commensurate l = 1/6 characteristic stacking order, it is found out that this phase disappears with a 0.3 ps time constant. Simultaneously, in the same experiment, the emergence of the incommensurate phase, with a slightly slower 2.0 ps time constant, is determined from the intensity of the CDW satellites aligned around the incommensurate l = 1/3 characteristic stacking order. Finally, these results might be of relevance in understanding the metallic character of the laser-induced metastable “hidden” state recently discovered in this compound.
- Authors:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States); European XFEL GmbH, Schenefeld (Germany)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Jozef Stefan Institute and CENN Nanocenter, Ljubljana (Slovenia)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1369308
- Alternate Identifier(s):
- OSTI ID: 1361867
- Grant/Contract Number:
- Peter-Paul-Ewald Fellowship; AC02-76SF00515
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Structural Dynamics
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 4; Journal ID: ISSN 2329-7778
- Publisher:
- American Crystallographic Association/AIP
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Le Guyader, L., Chase, T., Reid, A. H., Li, R. K., Svetin, D., Shen, X., Vecchione, T., Wang, X. J., Mihailovic, D., and Durr, H. A. Stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 probed with MeV ultrafast electron diffraction. United States: N. p., 2017.
Web. doi:10.1063/1.4982918.
Le Guyader, L., Chase, T., Reid, A. H., Li, R. K., Svetin, D., Shen, X., Vecchione, T., Wang, X. J., Mihailovic, D., & Durr, H. A. Stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 probed with MeV ultrafast electron diffraction. United States. https://doi.org/10.1063/1.4982918
Le Guyader, L., Chase, T., Reid, A. H., Li, R. K., Svetin, D., Shen, X., Vecchione, T., Wang, X. J., Mihailovic, D., and Durr, H. A. 2017.
"Stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 probed with MeV ultrafast electron diffraction". United States. https://doi.org/10.1063/1.4982918. https://www.osti.gov/servlets/purl/1369308.
@article{osti_1369308,
title = {Stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 probed with MeV ultrafast electron diffraction},
author = {Le Guyader, L. and Chase, T. and Reid, A. H. and Li, R. K. and Svetin, D. and Shen, X. and Vecchione, T. and Wang, X. J. and Mihailovic, D. and Durr, H. A.},
abstractNote = {Transitions between different charge density wave (CDW) states in quasi-two-dimensional materials may be accompanied also by changes in the inter-layer stacking of the CDW. Using MeV ultrafast electron diffraction, the out-of-plane stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 is investigated for the first time. From the intensity of the CDW satellites aligned around the commensurate l = 1/6 characteristic stacking order, it is found out that this phase disappears with a 0.3 ps time constant. Simultaneously, in the same experiment, the emergence of the incommensurate phase, with a slightly slower 2.0 ps time constant, is determined from the intensity of the CDW satellites aligned around the incommensurate l = 1/3 characteristic stacking order. Finally, these results might be of relevance in understanding the metallic character of the laser-induced metastable “hidden” state recently discovered in this compound.},
doi = {10.1063/1.4982918},
url = {https://www.osti.gov/biblio/1369308},
journal = {Structural Dynamics},
issn = {2329-7778},
number = 4,
volume = 4,
place = {United States},
year = {Wed May 03 00:00:00 EDT 2017},
month = {Wed May 03 00:00:00 EDT 2017}
}
Web of Science
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Works referencing / citing this record:
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