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Domröse T, Danz T, Schaible SF, Rossnagel K, Yalunin SV, Ropers C. Light-induced hexatic state in a layered quantum material. Nat Mater 2023; 22:1345-1351. [PMID: 37414945 PMCID: PMC10627829 DOI: 10.1038/s41563-023-01600-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 06/05/2023] [Indexed: 07/08/2023]
Abstract
The tunability of materials properties by light promises a wealth of future applications in energy conversion and information technology. Strongly correlated materials such as transition metal dichalcogenides offer optical control of electronic phases, charge ordering and interlayer correlations by photodoping. Here, we find the emergence of a transient hexatic state during the laser-induced transformation between two charge-density wave phases in a thin-film transition metal dichalcogenide, 1T-type tantalum disulfide (1T-TaS2). Introducing tilt-series ultrafast nanobeam electron diffraction, we reconstruct charge-density wave rocking curves at high momentum resolution. An intermittent suppression of three-dimensional structural correlations promotes a loss of in-plane translational order caused by a high density of unbound topological defects, characteristic of a hexatic intermediate. Our results demonstrate the merit of tomographic ultrafast structural probing in tracing coupled order parameters, heralding universal nanoscale access to laser-induced dimensionality control in functional heterostructures and devices.
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Affiliation(s)
- Till Domröse
- Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Thomas Danz
- Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Sophie F Schaible
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Kai Rossnagel
- Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany
- Ruprecht Haensel Laboratory, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - Sergey V Yalunin
- Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Claus Ropers
- Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany.
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Danz T, Domröse T, Ropers C. Ultrafast nanoimaging of the order parameter in a structural phase transition. Science 2021; 371:371-374. [DOI: 10.1126/science.abd2774] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 12/11/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Thomas Danz
- 4th Physical Institute – Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - Till Domröse
- 4th Physical Institute – Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
| | - Claus Ropers
- 4th Physical Institute – Solids and Nanostructures, University of Göttingen, 37077 Göttingen, Germany
- Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
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Feist A, Priebe KE, Rathje C, Bach N, Rubiano da Silva N, Danz T, Moller M, Domrose T, Rittmann T, Yalunin SV, Hohage T, Sivis M, Schafer S, Ropers C. Generation and attosecond shaping of high coherence free-electron beams for ultrafast TEM. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201920508012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We demonstrate the generation and optical control of ultrashort high-coherence electron pulses. The free-electron quantum state is phase-modulated in the longitudinal and transverse dimensions, and the formation of attosecond electron pulse trains is quantitatively probed.
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Bach N, Feist A, Domrose T, Danz T, Möller M, Rubiano da Silva N, Priebe K, Rathje C, Schafer S, Ropers C. Highly Coherent Femtosecond Electron Pulses for Ultrafast Transmission Electron Microscopy. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201920508014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We describe the implementation and detailed characterization of a laser-triggered field-emitter electron source integrated into a modified transmission electron microscope. Highly coherent electron pulses enable high resolution ultrafast electron imaging and diffraction.
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Feist A, Bach N, Rubiano da Silva N, Danz T, Möller M, Priebe KE, Domröse T, Gatzmann JG, Rost S, Schauss J, Strauch S, Bormann R, Sivis M, Schäfer S, Ropers C. Ultrafast transmission electron microscopy using a laser-driven field emitter: Femtosecond resolution with a high coherence electron beam. Ultramicroscopy 2016; 176:63-73. [PMID: 28139341 DOI: 10.1016/j.ultramic.2016.12.005] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 11/30/2016] [Accepted: 12/02/2016] [Indexed: 10/20/2022]
Abstract
We present the development of the first ultrafast transmission electron microscope (UTEM) driven by localized photoemission from a field emitter cathode. We describe the implementation of the instrument, the photoemitter concept and the quantitative electron beam parameters achieved. Establishing a new source for ultrafast TEM, the Göttingen UTEM employs nano-localized linear photoemission from a Schottky emitter, which enables operation with freely tunable temporal structure, from continuous wave to femtosecond pulsed mode. Using this emission mechanism, we achieve record pulse properties in ultrafast electron microscopy of 9Å focused beam diameter, 200fs pulse duration and 0.6eV energy width. We illustrate the possibility to conduct ultrafast imaging, diffraction, holography and spectroscopy with this instrument and also discuss opportunities to harness quantum coherent interactions between intense laser fields and free-electron beams.
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Affiliation(s)
- Armin Feist
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Nora Bach
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Nara Rubiano da Silva
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Thomas Danz
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Marcel Möller
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Katharina E Priebe
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Till Domröse
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - J Gregor Gatzmann
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Stefan Rost
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Jakob Schauss
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Stefanie Strauch
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Reiner Bormann
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Murat Sivis
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany
| | - Sascha Schäfer
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany.
| | - Claus Ropers
- 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany.
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