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Privault G, Hervé M, Godin N, Bertoni R, Akagi S, Kubicki J, Tokoro H, Ohkoshi S, Lorenc M, Collet E. From Ultrafast Photoinduced Small Polarons to Cooperative and Macroscopic Charge-Transfer Phase Transition. Angew Chem Int Ed Engl 2024:e202408284. [PMID: 38979690 DOI: 10.1002/anie.202408284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 07/05/2024] [Accepted: 07/08/2024] [Indexed: 07/10/2024]
Abstract
We study by femtosecond infrared spectroscopy the ultrafast and persistent photoinduced phase transition of the Rb0.94Mn0.94Co0.06[Fe(CN)6]0.98 ⋅ 0.2H2O material, induced at room temperature by a single laser shot. This system exhibits a charge-transfer based phase transition with a 75 K wide thermal hysteresis, centred at room temperature, from the low temperature Mn3+-N-C-Fe2+ tetragonal phase to the high temperature Mn2+-N-C-Fe3+ cubic phase. At room temperature, the photoinduced phase transition is persistent. However, the out-of-equilibrium dynamics leading to this phase is multi-scale. Femtosecond infrared spectroscopy, particularly sensitive to local reorganizations through the evolution of the frequency of the N-C vibration modes with the different characteristic electronic states, reveals that at low laser fluence and on short time scale, the photoexcitation of the Mn3+-N-C-Fe2+ phase creates small charge-transfer polarons [Mn2+-N-C-Fe3+]* within ≃250 fs. The local trapping of photoinduced intermetallic charge-transfer is characterized by the appearance of a polaronic infrared band, due to the surrounding Mn2+-N-C-Fe2+ species. Above a threshold fluence, when a critical fraction of small CT-polarons is reached, the macroscopic phase transition to the persistent Mn2+-N-C-Fe3+ cubic phase occurs within ≃ 100 ps. This non-linear photo-response results from elastic cooperativity, intrinsic to a switchable lattice and reminiscent of a feedback mechanism.
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Affiliation(s)
- G Privault
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - M Hervé
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - N Godin
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - R Bertoni
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - S Akagi
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - J Kubicki
- Faculty of Physics, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 2, 61-614, Poznań, Poland
| | - H Tokoro
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - S Ohkoshi
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - M Lorenc
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - Eric Collet
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
- Institut universitaire de France (IUF), 75231, Paris, France
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Hervé M, Privault G, Trzop E, Akagi S, Watier Y, Zerdane S, Chaban I, Torres Ramírez RG, Mariette C, Volte A, Cammarata M, Levantino M, Tokoro H, Ohkoshi SI, Collet E. Ultrafast and persistent photoinduced phase transition at room temperature monitored by streaming powder diffraction. Nat Commun 2024; 15:267. [PMID: 38267429 PMCID: PMC10808240 DOI: 10.1038/s41467-023-44440-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 12/13/2023] [Indexed: 01/26/2024] Open
Abstract
Ultrafast photoinduced phase transitions at room temperature, driven by a single laser shot and persisting long after stimuli, represent emerging routes for ultrafast control over materials' properties. Time-resolved studies provide fundamental mechanistic insight into far-from-equilibrium electronic and structural dynamics. Here we study the photoinduced phase transformation of the Rb0.94Mn0.94Co0.06[Fe(CN)6]0.98 material, designed to exhibit a 75 K wide thermal hysteresis around room temperature between MnIIIFeII tetragonal and MnIIFeIII cubic phases. We developed a specific powder sample streaming technique to monitor by ultrafast X-ray diffraction the structural and symmetry changes. We show that the photoinduced polarons expand the lattice, while the tetragonal-to-cubic photoinduced phase transition occurs within 100 ps above threshold fluence. These results are rationalized within the framework of the Landau theory of phase transition as an elastically-driven and cooperative process. We foresee broad applications of the streaming powder technique to study non-reversible and ultrafast dynamics.
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Affiliation(s)
- Marius Hervé
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - Gaël Privault
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - Elzbieta Trzop
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - Shintaro Akagi
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Yves Watier
- ESRF - The European Synchrotron, 71 avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, Grenoble, France
| | - Serhane Zerdane
- SwissFEL, Paul Scherrer Institut, Villigen, PSI, Switzerland
| | - Ievgeniia Chaban
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - Ricardo G Torres Ramírez
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan
| | - Celine Mariette
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France
- ESRF - The European Synchrotron, 71 avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, Grenoble, France
| | - Alix Volte
- ESRF - The European Synchrotron, 71 avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, Grenoble, France
| | - Marco Cammarata
- ESRF - The European Synchrotron, 71 avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, Grenoble, France
| | - Matteo Levantino
- ESRF - The European Synchrotron, 71 avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, Grenoble, France
| | - Hiroko Tokoro
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan.
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
| | - Shin-Ichi Ohkoshi
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan.
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Eric Collet
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, 35000, Rennes, France.
- CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Japan.
- Institut universitaire de France (IUF), Paris, France.
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Abstract
This short review article provides the reader with a summary of the history of organic conductors. To retain a neutral and objective point of view regarding the history, background, novelty, and details of each research subject within this field, a thousand references have been cited with full titles and arranged in chronological order. Among the research conducted over ~70 years, topics from the last two decades are discussed in more detail than the rest. Unlike other papers in this issue, this review will help readers to understand the origin of each topic within the field of organic conductors and how they have evolved. Due to the advancements achieved over these 70 years, the field is nearing new horizons. As history is often a reflection of the future, this review is expected to show the future directions of this research field.
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Seiler H, Krynski M, Zahn D, Hammer S, Windsor YW, Vasileiadis T, Pflaum J, Ernstorfer R, Rossi M, Schwoerer H. Nuclear dynamics of singlet exciton fission in pentacene single crystals. SCIENCE ADVANCES 2021; 7:7/26/eabg0869. [PMID: 34172443 PMCID: PMC8232917 DOI: 10.1126/sciadv.abg0869] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 05/14/2021] [Indexed: 05/22/2023]
Abstract
Singlet exciton fission (SEF) is a key process for developing efficient optoelectronic devices. An aspect rarely probed directly, yet with tremendous impact on SEF properties, is the nuclear structure and dynamics involved in this process. Here, we directly observe the nuclear dynamics accompanying the SEF process in single crystal pentacene using femtosecond electron diffraction. The data reveal coherent atomic motions at 1 THz, incoherent motions, and an anisotropic lattice distortion representing the polaronic character of the triplet excitons. Combining molecular dynamics simulations, time-dependent density-functional theory, and experimental structure factor analysis, the coherent motions are identified as collective sliding motions of the pentacene molecules along their long axis. Such motions modify the excitonic coupling between adjacent molecules. Our findings reveal that long-range motions play a decisive part in the electronic decoupling of the electronically correlated triplet pairs and shed light on why SEF occurs on ultrafast time scales.
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Affiliation(s)
- Hélène Seiler
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany.
| | - Marcin Krynski
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany
| | - Daniela Zahn
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany
| | - Sebastian Hammer
- Julius-Maximilians-Universität, Experimentelle Physik VI, Am Hubland, 97074 Würzburg, Germany.
| | | | | | - Jens Pflaum
- Julius-Maximilians-Universität, Experimentelle Physik VI, Am Hubland, 97074 Würzburg, Germany
- Bayerisches Zentrum für Angewandte Energieforschung, Magdalene-Schoch-Straße 3, 97074 Würzburg, Germany
| | - Ralph Ernstorfer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany
| | - Mariana Rossi
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany.
- Max-Planck-Institut für Struktur und Dynamik der Materie, 22761 Hamburg, Germany
| | - Heinrich Schwoerer
- Max-Planck-Institut für Struktur und Dynamik der Materie, 22761 Hamburg, Germany.
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Jiang N, Bai Y, Yang B, Wang D, Zhao S. Switchable metal-insulator transition in core-shell cluster-assembled nanostructure films. NANOSCALE 2020; 12:18144-18152. [PMID: 32852508 DOI: 10.1039/d0nr04681g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Fe/Fe3O4 core-shell-cluster-assembled nanostructured films were prepared using the low-energy cluster beam deposition technique. The temperature-dependent resistivity behaviors were investigated for the films with changing core-occupation ratio of clusters. Much interestingly and surprisingly, a switchable metal-insulator transition can be observed, featuring the rapid switching from the metal state to the insulation state and then back to the metal state, for films within a specific range of core-occupation ratio. Further, the resistivity change rate used to characterize the metal-insulator transition can reach as high as two orders of magnitude over a very narrow temperature region. The design of Fe/Fe3O4 core-shell clusters plays a decisive role in the mechanism of the switchable metal-insulator transition in these films. The assembled core-shell clusters in the films form current conduction channels that are switchable between the cores and shells of clusters as the temperature changes. The switching of the current conduction channels can be regulated by controlling the core-occupation ratios of clusters, which induce a switchable metal-insulator transition and can be verified by the effective medium theory over a specific core-occupation ratio range.
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Affiliation(s)
- Ning Jiang
- School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, PR China.
| | - Yulong Bai
- School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, PR China.
| | - Bo Yang
- School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, PR China.
| | - Dezhi Wang
- School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, PR China.
| | - Shifeng Zhao
- School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, PR China.
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