Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Rittmann, J."'
Autor:
Maklar, J., Windsor, Y. W., Nicholson, C. W., Puppin, M., Walmsley, P., Esposito, V., Porer, M., Rittmann, J., Leuenberger, D., Kubli, M., Savoini, M., Abreu, E., Johnson, S. L., Beaud, P., Ingold, G., Staub, U., Fisher, I. R., Ernstorfer, R., Wolf, M., Rettig, L.
The interaction of many-body systems with intense light pulses may lead to novel emergent phenomena far from equilibrium. Recent discoveries, such as the optical enhancement of the critical temperature in certain superconductors and the photo-stabili
Externí odkaz:
http://arxiv.org/abs/2011.03230
Autor:
Neugebauer, M. J., Huber, T., Savoini, M., Abreu, E., Esposito, V., Kubli, M., Rettig, L., Bothschafter, E., Grübel, S., Kubacka, T., Rittmann, J., Ingold, G., Beaud, P., Dominko, D., Demsar, J., Johnson, S. L.
Publikováno v:
Phys. Rev. B 99, 220302 (2019)
Femtosecond time-resolved x-ray diffraction is employed to study the dynamics of the periodic lattice distortion (PLD) associated with the charge-density-wave (CDW) in K0.3MoO3. Using a multi-pulse scheme we show the ability to extend the lifetime of
Externí odkaz:
http://arxiv.org/abs/1902.00388
Autor:
Porer, M., Fechner, M., Bothschafter, E., Rettig, L., Savoini, M., Esposito, V., Rittmann, J., Kubli, M., Neugebauer, M. J., Abreu, E., Kubacka, T., Huber, T., Lantz, G., Parchenko, S., Grübel, S., Paarmann, A., Noack, J., Beaud, P., Ingold, G., Aschauer, U., Johnson, S. L., Staub, U.
Publikováno v:
Phys. Rev. Lett. 121, 055701 (2018)
The ultrafast dynamics of the octahedral rotation in Ca:SrTiO3 is studied by time resolved x-ray diffraction after photo excitation over the band gap. By monitoring the diffraction intensity of a superlattice reflection that is directly related to th
Externí odkaz:
http://arxiv.org/abs/1805.00580
Autor:
Lantz, G., Laulhé, C., Ravy, S., Kubli, M., Savoini, M., Tasca, K., Abreu, E., Esposito, V., Porer, M., Ciavardini, A., Cario, L., Rittmann, J., Beaud, P., Johnson, S. L.
Publikováno v:
Phys. Rev. B 96, 224101 (2017)
Recent experiments have shown that the high temperature incommensurate (I) charge density wave (CDW) phase of 1T-TaS2 can be photoinduced from the lower temperature, nearly commensurate (NC) CDW state. Here we report a time-resolved x-ray diffraction
Externí odkaz:
http://arxiv.org/abs/1708.08811
Autor:
Lantz, G., Neugebauer, M. J., Kubli, M., Savoini, M., Abreu, E., Tasca, K., Dornes, C., Esposito, V., Rittmann, J., Windsor, Y. W., Beaud, P., Ingold, G., Johnson, S. L.
Publikováno v:
Phys. Rev. Lett. 119, 227207 (2017)
The Prototypical magnetic memory shape alloy Ni$_2$MnGa undergoes various phase transitions as a function of temperature, pressure, and doping. In the low-temperature phases below 260 K, an incommensurate structural modulation occurs along the [110]
Externí odkaz:
http://arxiv.org/abs/1706.01685
Autor:
Laulhé, C., Huber, T., Lantz, G., Ferrer, A., Mariager, S. O., Grübel, S., Rittmann, J., Johnson, J. A., Esposito, V., Lübcke, A., Huber, L., Kubli, M., Savoini, M., Jacques, V. L. R., Cario, L., Corraze, B., Janod, E., Ingold, G., Beaud, P., Johnson, S. L., Ravy, S.
Publikováno v:
Phys. Rev. Lett. 118, 247401 (2017)
Femtosecond time-resolved X-ray diffraction is used to study a photo-induced phase transition between two charge density wave (CDW) states in 1T-TaS$_2$, namely the nearly commensurate (NC) and the incommensurate (I) CDW states. Structural modulation
Externí odkaz:
http://arxiv.org/abs/1703.07465
Autor:
Grübel, S., Johnson, J. A., Beaud, P., Dornes, C., Ferrer, A., Haborets, V., Huber, L., Huber, T., Kohutych, A., Kubacka, T., Kubli, M., Mariager, S. O., Rittmann, J., Saari, J. I., Vysochanskii, Y., Ingold, G., Johnson, S. L.
Intense, few-cycle pulses in the terahertz frequency range have strong potential for schemes of control over vibrational modes in solid-state materials in the electronic ground-state. Here we report an experiment using single cycle terahertz pulses t
Externí odkaz:
http://arxiv.org/abs/1602.05435
Autor:
Rettig, L., Mariager, S. O., Ferrer, A., Grübel, S., Johnson, J. A., Rittmann, J., Wolf, T., Johnson, S. L., Ingold, G., Beaud, P., Staub, U.
Publikováno v:
Phys. Rev. Lett. 114, 067402 (2015)
Using femtosecond time-resolved x-ray diffraction we investigate the structural dynamics of the coherently excited A1g phonon mode in the Fe-pnictide parent compound BaFe2As2. The fluence dependent intensity oscillations of two specific Bragg reflect
Externí odkaz:
http://arxiv.org/abs/1411.0718
Autor:
Zamudio-Bayer, V., Leppert, L., Hirsch, K., Langenberg, A., Rittmann, J., Kossick, M., Vogel, M., Richter, R., Terasaki, A., Möller, T., Issendorff, B. v., Kümmel, S., Lau, J. T.
Publikováno v:
Phys. Rev. B 88, 115425 (2013)
The interaction of a single manganese impurity with silicon is analyzed in a combined experimental and theoretical study of the electronic, magnetic, and structural properties of manganese-doped silicon clusters. The structural transition from exohed
Externí odkaz:
http://arxiv.org/abs/1302.6718
Autor:
Porer M., Fechner M., Bothschafter E. M., Rettig L., Narayan A., Radovic M., Savoini M., Esposito V., Rittmann J., Kubli M., Kubacka T., Huber T., Neugebauer M., Abreu E., Grübel S., Beaud P., Ingold G., Lantz G., Parchenko S., Song S., Sato T., Aschauer U., Spaldin N., Johnson S. L., Staub U.
Publikováno v:
EPJ Web of Conferences, Vol 205, p 07001 (2019)
We photoexcite SrTiO3 and EuTiO3 in their purely soft-mode-driven structurally distorted phase and trace the structural order parameter via ultra-short x-rays. We observe a rapid decay for SrTiO3 and an intriguing transient enhancement for EuTiO3.
Externí odkaz:
https://doaj.org/article/6c24965ee2ac4b4ba75b3f82cd77f354
