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Keywords

Ultrafast Spectroscopy, Photo-induced Phase Transition, Time-resolved Diffraction

Countries

France

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Employment (1)

University of Rennes: Rennes, FR

(Institut de Physique de Rennes)
Employment
Source: Self-asserted source
Roman Bertoni

Works (35)

Ultrafast spectroscopy of coherent phonons across the pressure driven insulator to metal phase transition in V2O3

Physical Review Research
2024-10-15 | Journal article
DOI: 10.1103/PhysRevResearch.6.043037
Contributors: Thomas Gauthier; Nicolas Godin; Gaël Privault; Roman Bertoni; Etienne Janod; Danylo Babich; Benoit Corraze; Julien Tranchant; Laurent Cario
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Crossref

From Ultrafast Photoinduced Small Polarons to Cooperative and Macroscopic Charge‐Transfer Phase Transition

Angewandte Chemie International Edition
2024-10-07 | Journal article
DOI: 10.1002/anie.202408284
Contributors: G. Privault; M. Hervé; N. Godin; R. Bertoni; S. Akagi; J. Kubicki; H. Tokoro; S. Ohkoshi; M. Lorenc; Eric Collet
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From Ultrafast Photoinduced Small Polarons to Cooperative and Macroscopic Charge‐Transfer Phase Transition

Angewandte Chemie
2024-10-07 | Journal article
DOI: 10.1002/ange.202408284
Contributors: G. Privault; M. Hervé; N. Godin; R. Bertoni; S. Akagi; J. Kubicki; H. Tokoro; S. Ohkoshi; M. Lorenc; Eric Collet
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Crossref

Photoinduced dynamics during electronic transfer from narrow to wide bandgap layers in one-dimensional heterostructured materials

Nature Communications
2024-05-30 | Journal article | Author
DOI: 10.1038/s41467-024-48880-3
Part of ISSN: 2041-1723
Contributors: Yuri Saida; Thomas Gauthier; Hiroo Suzuki; Satoshi Ohmura; Ryo Shikata; Yui Iwasaki; Godai Noyama; Misaki Kishibuchi; Yuichiro Tanaka; Wataru Yajima et al.
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Multiscale out-of-equilibrium dynamics driven by pulsed laser excitation in spin-crossover materials: A combined thermoelastic and mechanoelastic study

Physical Review B
2023-07-21 | Journal article
DOI: 10.1103/PhysRevB.108.014306
Contributors: Laurentiu Stoleriu; Masamichi Nishino; Seiji Miyashita; Alexandru Stancu; Roman Bertoni; Eric Collet; Maciej Lorenc; Cristian Enachescu
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Dynamical limits for the molecular switching in a photoexcited material revealed by X-ray diffraction

Communications Physics
2022-12 | Journal article
DOI: 10.1038/s42005-022-00940-0
Part of ISSN: 2399-3650
Contributors: Alix Volte; Celine Mariette; Roman Bertoni; Marco Cammarata; Xu Dong; Elzbieta TRZOP; Herve Cailleau; Eric Collet; Matteo Levantino; Michael Wulff et al.
Source: Self-asserted source
Roman Bertoni

Ultrafast photo-induced dynamics of $$\hbox {V}_{2} \hbox {O}_{3}$$ thin films under hydrostatic pressure

The European Physical Journal Special Topics
2022-10-11 | Journal article | Author
DOI: 10.1140/epjs/s11734-022-00680-w
Part of ISSN: 1951-6355
Part of ISSN: 1951-6401
Contributors: Gaël Privault; Guénolé Huitric; Marius Hervé; Elzbieta Trzop; Julien Tranchant; Benoit Corraze; Zohra Khaldi; Laurent Cario; Etienne Janod; Jean-Claude Ameline et al.
Source: Self-asserted source
Roman Bertoni

Artificial Electro-Optical Neuron Integrating Hot Electrons in a Mott Insulator

Physical Review Applied
2022-01-28 | Journal article
DOI: 10.1103/PhysRevApplied.17.014040
Contributors: Danylo Babich; Laurent Cario; Benoit Corraze; Maciej Lorenc; Julien Tranchant; Roman Bertoni; Marco Cammarata; Hervé Cailleau; Etienne Janod
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Out-of-equilibrium lattice response to photo-induced charge-transfer in a MnFe Prussian blue analogue

Journal of Materials Chemistry C
2021 | Journal article
DOI: 10.1039/D1TC01487K
Contributors: G. Azzolina; R. Bertoni; C. Mariette; M. Cammarata; E. Trzop; C. Ecolivet; M. Sander; M. Levantino; H. Tokoro; K. Imoto et al.
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Strain wave pathway to semiconductor-to-metal transition revealed by time-resolved X-ray powder diffraction

Nature Communications
2021-12 | Journal article
DOI: 10.1038/s41467-021-21316-y
Part of ISSN: 2041-1723
Contributors: Celine Mariette; M. Lorenc; H. Cailleau; Eric Collet; Laurent Guérin; A. Volte; Elzbieta TRZOP; Roman Bertoni; X. Dong; B. Lépine et al.
Source: Self-asserted source
Roman Bertoni

General Landau theory of non-symmetry-breaking and symmetry-breaking spin transition materials

Journal of Applied Physics
2021-02-28 | Journal article
DOI: 10.1063/5.0041453
Contributors: Giovanni Azzolina; Roman Bertoni; Eric Collet
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Crossref

Landau theory for non-symmetry-breaking electronic instability coupled to symmetry-breaking order parameter applied to Prussian blue analog

Physical Review B
2020-10-09 | Journal article
DOI: 10.1103/PhysRevB.102.134104
Contributors: Giovanni Azzolina; Roman Bertoni; Claude Ecolivet; Hiroko Tokoro; Shin-ichi Ohkoshi; Eric Collet
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Temperature dependence of the cooperative out-of-equilibrium elastic switching in a spin-crossover material

Physical Chemistry Chemical Physics
2019 | Journal article
DOI: 10.1039/C8CP07074A
Contributors: Roman Bertoni; Eric Collet; Hervé Cailleau; Marie-Laure Boillot; Antoine Tissot; Jérôme Laisney; Cristian Enachescu; Maciej Lorenc
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Single laser shot photoinduced phase transition of rubidium manganese hexacyanoferrate investigated by X-ray diffraction

European Journal of Inorganic Chemistry
2019-02 | Journal article
DOI: 10.1002/ejic.201801478
Part of ISSN: 1434-1948
Contributors: Giovanni Azzolina; Eric Collet; Céline Mariette; Marco Cammarata; Elzbieta Trzop; mathias Sander; Matteo Levantino; Kosuke Nakagawa; Hiroko Tokoro; Shin-ichi Ohkoshi et al.
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Lattice phonon modes of the spin crossover crystal [Fe(phen)2(NCS)2] studied by THz, IR, Raman spectroscopies and DFT calculations

The European Physical Journal B
2019-01 | Journal article
DOI: 10.1140/epjb/e2018-90553-2
Part of ISSN: 1434-6028
Contributors: Eric Collet; Giovanni Azzolina; Tomoaki Ichii; Laurent Guerin; Roman Bertoni; Alain Moréac; Marco Cammarata; Nathalie Daro; Guillaume Chastanet; Jacek Kubicki et al.
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Light-induced spin crossover—Solution and solid-state processes

Comptes Rendus Chimie
2018 | Journal article
DOI: 10.1016/j.crci.2018.02.011
Part of ISSN: 1631-0748
Contributors: Guillaume Chastanet; Maciej Lorenc; Roman Bertoni; Cédric Desplanches
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Ultrafast Heat Flow in Heterostructures of Au Nanoclusters on Thin Films: Atomic Disorder Induced by Hot Electrons

ACS Nano
2018-07-11 | Journal article
DOI: 10.1021/acsnano.8b01423
Part of ISSN: 1936-0851
Contributors: Thomas Vasileiadis; Lutz Waldecker; Dawn Foster; Alessandra Da Silva; Daniela Zahn; Roman Bertoni; Richard E. Palmer; Ralph Ernstorfer
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Momentum-Resolved View of Electron-Phonon Coupling in Multilayer WSe2

Physical Review Letters
2017-07 | Journal article
DOI: 10.1103/physrevlett.119.036803
Part of ISSN: 0031-9007
Contributors: L. Waldecker; R. Bertoni; H. Hübener; T. Brumme; T. Vasileiadis; D. Zahn; A. Rubio; R. Ernstorfer
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Theoretical approach for elastically driven cooperative switching of spin-crossover compounds impacted by an ultrashort laser pulse

Physical Review B
2017-06 | Journal article
DOI: 10.1103/physrevb.95.224107
Part of ISSN: 2469-9950
Contributors: Cristian Enachescu; Laurentiu Stoleriu; Masamichi Nishino; Seiji Miyashita; Alexandru Stancu; Maciej Lorenc; Roman Bertoni; Hervé Cailleau; Eric Collet
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Coherent and incoherent structural dynamics in laser-excited antimony

Physical Review B
2017-02-01 | Journal article
DOI: 10.1103/physrevb.95.054302
Part of ISSN: 2469-9950
Contributors: Lutz Waldecker; Thomas Vasileiadis; Roman Bertoni; Ralph Ernstorfer; Tobias Zier; Felipe H. Valencia; Martin E. Garcia; Eeuwe S. Zijlstra
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Cooperative elastic switching vs. laser heating in [Fe(phen)2(NCS)2] spin-crossover crystals excited by a laser pulse

CrystEngComm
2016 | Journal article
DOI: 10.1039/c6ce00659k
Part of ISSN: 1466-8033
Contributors: R. Bertoni; M. Lorenc; T. Graber; R. Henning; K. Moffat; J.-F. Létard; E. Collet
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Generation and Evolution of Spin-, Valley-, and Layer-Polarized Excited Carriers in Inversion-Symmetric WSe2

Physical Review Letters
2016 | Journal article
DOI: 10.1103/physrevlett.117.277201
Part of ISSN: 0031-9007
Contributors: R. Bertoni; C. W. Nicholson; L. Waldecker; H. Hübener; C. Monney; U. De Giovannini; M. Puppin; M. Hoesch; E. Springate; R. T. Chapman et al.
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Electron-Phonon Coupling and Energy Flow in a Simple Metal beyond the Two-Temperature Approximation

Physical Review X
2016-04-06 | Journal article
DOI: 10.1103/physrevx.6.021003
Part of ISSN: 2160-3308
Contributors: Lutz Waldecker; Roman Bertoni; Ralph Ernstorfer; Jan Vorberger
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Elastically driven cooperative response of a molecular material impacted by a laser pulse

Nature Materials
2016-03 | Journal article
DOI: 10.1038/nmat4606
Part of ISSN: 1476-1122
Contributors: Roman Bertoni; Maciej Lorenc; Hervé Cailleau; Antoine Tissot; Jérôme Laisney; Marie-Laure Boillot; Laurentiu Stoleriu; Alexandru Stancu; Cristian Enachescu; Eric Collet
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Femtosecond spin-state photo-switching dynamics in an FeIII spin crossover solid accompanied by coherent structural vibrations

Journal of Materials Chemistry C
2015 | Journal article
DOI: 10.1039/c5tc00854a
Part of ISSN: 2050-7526
Contributors: R. Bertoni; M. Lorenc; J. Laisney; A. Tissot; A. Moréac; S. F. Matar; M.-L. Boillot; E. Collet
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Time-domain separation of optical properties from structural transitions in resonantly bonded materials

Nature Materials
2015-07 | Journal article
DOI: 10.1038/nmat4359
Part of ISSN: 1476-1122
Contributors: Lutz Waldecker; Timothy A. Miller; Miquel Rudé; Roman Bertoni; Johann Osmond; Valerio Pruneri; Robert E. Simpson; Ralph Ernstorfer; Simon Wall
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Ultrafast Light-Induced Spin-State Trapping Photophysics Investigated in Fe(phen)2(NCS)2 Spin-Crossover Crystal

Accounts of Chemical Research
2015-02 | Journal article
DOI: 10.1021/ar500444d
Part of ISSN: 0001-4842
Contributors: Roman Bertoni; Marco Cammarata; Maciej Lorenc; Samir F. Matar; Jean-François Létard; Henrik T. Lemke; Eric Collet
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Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit

Journal of Applied Physics
2015-01 | Journal article
DOI: 10.1063/1.4906786
Part of ISSN: 0021-8979
Contributors: Lutz Waldecker; Roman Bertoni; Ralph Ernstorfer
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Femtosecond photoswitching dynamics and microsecond thermal conversion driven by laser heating in Fe III spin-crossover solids

Coordination Chemistry Reviews
2015-01 | Journal article
DOI: 10.1016/j.ccr.2014.05.024
Part of ISSN: 0010-8545
Contributors: R. Bertoni; M. Lorenc; A. Tissot; M.-L. Boillot; E. Collet
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Sequential Activation of Molecular Breathing and Bending during Spin-Crossover Photoswitching Revealed by Femtosecond Optical and X-Ray Absorption Spectroscopy

Physical Review Letters
2014-11 | Journal article
DOI: 10.1103/physrevlett.113.227402
Part of ISSN: 0031-9007
Contributors: Marco Cammarata; Roman Bertoni; Maciej Lorenc; Hervé Cailleau; Sergio Di Matteo; Cindy Mauriac; Samir F. Matar; Henrik Lemke; Matthieu Chollet; Sylvain Ravy et al.
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Femtosecond optical pump–probe reflectivity studies of spin-state photo-switching in the spin-crossover molecular crystals [Fe(PM-AzA)2(NCS)2]

Polyhedron
2013 | Journal article
DOI: 10.1016/j.poly.2013.03.009
Part of ISSN: 0277-5387
Contributors: Andrea Marino; Marina Servol; Roman Bertoni; Maciej Lorenc; Cindy Mauriac; Jean-François Létard; Eric Collet
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Ultrafast spin-state photoswitching in a crystal and slower consecutive processes investigated by femtosecond optical spectroscopy and picosecond X-ray diffraction

Physical Chemistry Chemical Physics
2012 | Journal article
DOI: 10.1039/c2cp23587k
Part of ISSN: 1463-9076
Contributors: Eric Collet; Nicolas Moisan; Chérif Baldé; Roman Bertoni; Elzbieta Trzop; Claire Laulhé; Maciej Lorenc; Marina Servol; Hervé Cailleau; Antoine Tissot et al.
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Femtosecond Spin-State Photoswitching of Molecular Nanocrystals Evidenced by Optical Spectroscopy

Angewandte Chemie International Edition
2012-06 | Journal article
DOI: 10.1002/anie.201202215
Part of ISSN: 1433-7851
Contributors: Roman Bertoni; Maciej Lorenc; Antoine Tissot; Marina Servol; Marie-Laure Boillot; Eric Collet
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Femtosecond Spin-State Photoswitching of Molecular Nanocrystals Evidenced by Optical Spectroscopy

Angewandte Chemie
2012-06 | Journal article
DOI: 10.1002/ange.201202215
Part of ISSN: 0044-8249
Contributors: Roman Bertoni; Maciej Lorenc; Antoine Tissot; Marina Servol; Marie-Laure Boillot; Eric Collet
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The cooperative spin-state transition of an iron(iii) compound [FeIII(3-MeO-SalEen)2]PF6: thermal- vs. ultra-fast photo-switching

Journal of Materials Chemistry
2011 | Journal article
DOI: 10.1039/c1jm14163e
Part of ISSN: 0959-9428
Contributors: Antoine Tissot; Roman Bertoni; Eric Collet; Loic Toupet; Marie-Laure Boillot
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