Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Herzog, Marc"'
Autor:
Zeuschner, Steffen Peer, Pudell, Jan-Etienne, Mattern, Maximilian, Rössle, Matthias, Herzog, Marc, Baldi, Andrea, Askes, Sven H. C., Bargheer, Matias
Hafnium Nitride (HfN) is a promising and very robust alternative to gold for applications of nanoscale metals. Details of the nanomorphology related to variations in strain states and optical properties can be crucial for applications in nanophotonic
Externí odkaz:
http://arxiv.org/abs/2404.05398
Autor:
Mattern, Maximilian, von Reppert, Alexander, Zeuschner, Steffen Peer, Pudell, Jan-Etienne, Herzog, Marc, Bargheer, Matias
Publikováno v:
Photoacoustics 100503 (2023)
This review discusses picosecond ultrasonics experiments using ultrashort hard x-ray probe pulses to extract the transient strain response of laser-excited nanoscopic structures from Bragg-peak shifts. This method provides direct, layer-specific, and
Externí odkaz:
http://arxiv.org/abs/2302.14116
Publikováno v:
Progress in Surface Science, 2022, 100679
An excitonic insulator phase is expected to arise from the spontaneous formation of electron-hole pairs (excitons) in semiconductors where the exciton binding energy exceeds the size of the electronic band gap. At low temperature, these ground state
Externí odkaz:
http://arxiv.org/abs/2208.14574
Inhibition of the photoinduced structural phase transition in the excitonic insulator Ta$_2$NiSe$_5$
Autor:
Mor, Selene, Herzog, Marc, Noack, Johannes, Katayama, Naoyuki, Nohara, Minoru, Takagi, Hide, Trunschke, Annette, Mizokawa, Takashi, Monney, Claude, Stähler, Julia
Femtosecond time-resolved mid-infrared reflectivity is used to investigate the electron and phonon dynamics occurring at the direct band gap of the excitonic insulator Ta$_2$NiSe$_5$ below the critical temperature of its structural phase transition.
Externí odkaz:
http://arxiv.org/abs/1804.00882
Autor:
Sander, Matthias, Pudell, Jan-Etienne, Herzog, Marc, Bargheer, Matias, Bauer, Roman, Besse, Valentin, Temnov, Vasily, Gaal, Peter
We present time-resolved x-ray reflectivity measurements on laser excited coherent and incoherent surface deformations of thin metallic films. Based on a kinematical diffraction model, we derive the surface amplitude from the diffracted x-ray intensi
Externí odkaz:
http://arxiv.org/abs/1712.07931
Autor:
Sander, Mathias, Herzog, Marc, Pudell, Jan-Etienne, Bargheer, Matias, Weinkauf, Norbert, Pedersen, Martin, Newby, Gemma, Sellmann, Jan, Schwarzkopf, Jutta, Besse, Valentin, Temnov, Vasily, Gaal, Peter
Publikováno v:
Phys. Rev. Lett. 119, 075901 (2017)
X-ray reflectivity (XRR) measurements of femtosecond laser-induced transient gratings are applied to demonstrate the spatio-temporal coherent control of thermally induced surface deformations on ultrafast timescales. Using gracing incidence X-ray dif
Externí odkaz:
http://arxiv.org/abs/1704.01001
Autor:
Mor, Selene, Herzog, Marc, Golež, Denis, Werner, Philipp, Eckstein, Martin, Katayama, Naoyuki, Nohara, Minoru, Takagi, Hide, Mizokawa, Takashi, Monney, Claude, Stähler, Julia
Publikováno v:
Phys. Rev. Lett. 119, 086401 (2017)
We report on the nonequilibrium dynamics of the electronic structure of the layered semiconductor Ta$_2$NiSe$_5$ investigated by time- and angle-resolved photoelectron spectroscopy. We show that below the critical excitation density of $F_{C} = 0.2$
Externí odkaz:
http://arxiv.org/abs/1608.05586
Autor:
Herzog, Marc
This publication-based thesis represents a contribution to the active research field of ultrafast structural dynamics in laser-excited nanostructures. The investigation of such dynamics is mandatory for the understanding of the various physical proce
Externí odkaz:
http://opus.kobv.de/ubp/volltexte/2012/6263/
Autor:
Herzog, Marc
This doctoral thesis examines the impact of moderate Islamist parties on party system institutionalization in Turkey. Its focus is on the political emergence of ‘Muslim-Democrat’ parties. This term was coined by the scholar Vali Nasr and refers t
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549205
Autor:
Wegkamp, Daniel, Herzog, Marc, Xian, Lede, Gatti, Matteo, Cudazzo, Pierluigi, McGahan, Christina L., Marvel, Robert E., Haglund Jr., Richard F., Rubio, Angel, Wolf, Martin, Stähler, Julia
Publikováno v:
Phys. Rev. Lett. 113, 216401 (2014)
Using femtosecond time-resolved photoelectron spectroscopy we demonstrate that photoexcitation transforms monoclinic VO$_2$ quasi-instantaneously into a metal. Thereby, we exclude an 80 femtosecond structural bottleneck for the photoinduced electroni
Externí odkaz:
http://arxiv.org/abs/1408.3209