Výsledky vyhledávání - "Hanjo Schäfer"

Femtosecond nonequilibrium dynamics in quasi-1D CDW systems and

Autor: Dragan Mihailovic, Viktor V. Kabanov, Damir Starešinić, A. Tomeljak, Hanjo Schäfer, Katica Biljaković, Jure Demsar, B. Kavcic

Publikováno v: Physica B: Condensed Matter. 404:548-551

Here we report on detailed studies of the photoexcited carrier and collective mode dynamics in prototype quasi-1D charge density wave (CDW) systems K 0.3 MoO 3 and Rb 0.3 MoO 3 focusing on their low temperature and low excitation range. We show that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e566b7b07679819547cacaad4b16ed7
https://doi.org/10.1016/j.physb.2008.11.049

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Coherent Structural Dynamics of a Prototypical Charge-Density-Wave-to-Metal Transition

Autor: Gerhard Ingold, S. Grübel, Hanjo Schäfer, Jeremy A. Johnson, Jure Demsar, Christian Dornes, Claire Laulhé, Teresa Kubacka, S. O. Mariager, Sylvain Ravy, Andrés Ferrer, Steven L. Johnson, T. Huber, Lucas Huber, Paul Beaud, Andre Lübcke

Publikováno v: Physical Review Letters. 113

Using femtosecond time-resolved x-ray diffraction, we directly monitor the coherent lattice dynamics through an ultrafast charge-density-wave-to-metal transition in the prototypical Peierls system K(0.3)MoO(3) over a wide range of relevant excitation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::feb91d4145394d44d514bcf17e166068
https://doi.org/10.1103/physrevlett.113.026401

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Phase Transitions in Co-Doped NiMnGa Magnetic Shape Memory Alloys Probed by Coherent Phonons

Autor: Jan Mayer, Martin Grossmann, Martin Schubert, Konrad Samwer, Moritz Merklein, Mikhail Fonin, Mike Hettich, Thomas Dekorsy, Oliver Ristow, Alexej Laptev, Chuan He, Vitalyi Gusev, Yuanson Luo, Hanjo Schäfer, Jure Demsar

Publikováno v: Scopus-Elsevier

We investigate undoped and Co-doped NiMnGa magnetic shape memory alloys by ultrafast spectroscopy. The temperature dependence of collective modes is explained on the base of a charge-density-wave excitation shining new light on the phase transition.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b78e2b15d0132971ac2a594b6ead269
https://doi.org/10.1364/up.2014.07.mon.p1.41

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Charge density waves in nanocrystalline thin films of blue bronze K0.3MoO3

Autor: Carmen Ristoscu, Damir Starešinić, Hanjo Schäfer, Jure Demsar, Ion N. Mihailescu, Maja Đekić, I. Bogdanović Radović, Galja Pletikapić, Damir Dominko, T. Huber, Zdravko Siketić, Gabriel Socol, Vesna Svetličić, H. Samic, Katica Biljaković, Krešimir Salamon, A. Tomeljak, J. Marcus

Thin granular films of charge density wave (CDW) system K0.3MoO3 were prepared by pulsed laser deposition and investigated by various standard characterization methods such as GI-XRD, electric transport, TOF-ERDA, AFM and UV–visible spectroscopy. W

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28483845564e8d3b4c118d373a8a6725
https://www.bib.irb.hr/901300

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Femtosecond Electron Diffraction for the Study of Charge Density Waves

Autor: Helmuth Berger, M. Beyer, Marina Krumova, Maximilian Eichberger, Hanjo Schäfer, Jure Demsar, Gustavo Moriena, Germán Sciaini, R.J.D. Miller

Publikováno v: Scopus-Elsevier

We studied the dynamics of the periodic lattice distortion (PLD) in 1T-TaS2 by femtosecond electron diffraction. Coherent atomic motions in the nearly commensurate phase and the rotation of PLD have been revealed with increased photoexcitation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9549e9396fcd41afbeac7a625e04fb34
https://doi.org/10.1364/icusd.2012.it3d.2

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Ultrafast transient generation of spin-density-wave order in the normal state of BaFe2As2 driven by coherent lattice vibrations

Autor: M. Porer, A. Leitenstorfer, M. Beyer, Kyung Wan Kim, Robert Huber, T. Wolf, Christian Bernhard, Alexej Pashkin, Hanjo Schäfer, Jure Demsar

Publikováno v: Nature Materials

The interplay among charge, spin and lattice degrees of freedom in solids gives rise to intriguing macroscopic quantum phenomena such as colossal magnetoresistance, multiferroicity and high-temperature superconductivity. Strong coupling or competitio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47681e47e7b14712c7f349fc3f5cde1f
https://pubmed.ncbi.nlm.nih.gov/22484832

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Photoinduced melting of superconductivity in the high-Tcsuperconductor La2−xSrxCuO4probed by time-resolved optical and terahertz techniques

Autor: Ivan Bozovic, M. Beyer, David Städter, Gennady Logvenov, Gad Koren, Hanjo Schäfer, Jure Demsar, Matthias Beck, Viktor V. Kabanov

Publikováno v: Physical Review B. 83

The dynamics of depletion and recovery of a superconducting state in La${}_{2\ensuremath{-}x}$Sr${}_{x}$CuO${}_{4}$ thin films is investigated utilizing optical pump-probe and optical pump-THz-probe techniques as a function of temperature and excitat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::daa302a9a83aca5c968f50c93ebc54b9
https://doi.org/10.1103/physrevb.83.214515

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Disentanglement of the Electronic and Lattice Parts of the Order Parameter in a 1D Charge Density Wave System Probed by Femtosecond Spectroscopy

Autor: M. Beyer, Katica Biljaković, Hanjo Schäfer, Jure Demsar, Viktor V. Kabanov

Publikováno v: Physical Review Letters. 105

We report on the high resolution studies of the temperature (T) dependence of the q=0 phonon spectrum in the quasi one-dimensional charge density wave (CDW) compound K0.3MoO3 utilizing time-resolved optical spectroscopy. Numerous modes that appear be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fb0670de67202bfc8bd7b91c54689f0
https://doi.org/10.1103/physrevlett.105.066402

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