Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Mariager, S. O."'
Autor:
Rettig, L., Caviezel, A., Mariager, S. O., Ingold, G., Dornes, C., Huang, S-W., Johnson, J. A., Radovic, M., Huber, T., Kubacka, T., Ferrer, A., Lemke, H. T., Chollet, M., Zhu, D., Glownia, J. M., Sikorski, M., Robert, A., Nakamura, M., Kawasaki, M., Tokura, Y., Johnson, S. L., Beaud, P., Staub, U.
Publikováno v:
Phys. Rev. B 99, 134302 (2019)
We report on the ultrafast dynamics of charge order and structural response during the photoinduced suppression of charge and orbital order in a mixed-valence manganite. Employing femtosecond time-resolved resonant x-ray diffraction below and at the
Externí odkaz:
http://arxiv.org/abs/1808.00697
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:
Mariager, S. O., Dornes, C., Johnson, J. A., Ferrer, A., Grübel, S., Huber, T., Caviezel, A., Johnson, S. L., Eichhorn, T., Jakob, G., Elmers, H. J., Beaud, P., Quitmann, C., Ingold, G.
Magnetic shape memory Heusler alloys are multiferroics stabilized by the correlations between electronic, magnetic and structural order. To study these correlations we use time resolved x-ray diffraction and magneto-optical Kerr effect experiments to
Externí odkaz:
http://arxiv.org/abs/1405.6534
Autor:
Mankowsky, R., Subedi, A., Först, M., Mariager, S. O., Chollet, M., Lemke, H., Robinson, J., Glownia, J., Minitti, M., Frano, A., Fechner, M., Spaldin, N. A., Loew, T., Keimer, B., Georges, A., Cavalleri, A.
Publikováno v:
Nature, Vol. 516, 71-73 (2014)
THz-frequency optical pulses can resonantly drive selected vibrational modes in solids and deform their crystal structure. In complex oxides, this method has been used to melt electronic orders, drive insulator to metal transitions or induce supercon
Externí odkaz:
http://arxiv.org/abs/1405.2266
Autor:
Mansart, B., Cottet, M. J. G., Mancini, G. F., Jarlborg, T., Dugdale, S. B., Johnson, S. L., Mariager, S. O., Milne, C. J., Beaud, P., Grübel, S., Johnson, J. A., Kubacka, T., Ingold, G., Prsa, K., Rønnow, H. M., Conder, K., Pomjakushina, E., Chergui, M., Carbone, F.
Publikováno v:
Physical Review B 88, 054507 (2013)
The strength of the electron-phonon coupling parameter and its evolution throughout a solid's phase diagram often determines phenomena such as superconductivity, charge- and spin-density waves. Its experimental determination relies on the ability to
Externí odkaz:
http://arxiv.org/abs/1401.4072
Autor:
Caviezel, A., Mariager, S. O., Johnson, S. L., Möhr-Vorobeva, E., Huang, S. W., Ingold, G., Staub, U., Milne, C. J., Cheong, S. -W., Beaud, P.
We apply grazing-incidence femtosecond x-ray diffraction to investigate the details of the atomic motion connected with a displacively excited coherent optical phonon. We concentrate on the low frequency phonon associated with the charge and orbital
Externí odkaz:
http://arxiv.org/abs/1304.6900
The antiferromagnetic (AFM) to ferromagnetic (FM) first order phase transition of an epitaxial FeRh thin-film has been studied with x-ray magnetic circular dichroism using photoemission electron microscopy. The FM phase is magnetized in-plane due to
Externí odkaz:
http://arxiv.org/abs/1301.4164
We use time-resolved optical reflectivity to study the laser stimulated dynamics in the magnetic shape memory alloy Ni_2MnGa. We observe two coherent optical phonons, at 1.2 THz in the martensite phase and at 0.7 THz in the pre-martensite phase, whic
Externí odkaz:
http://arxiv.org/abs/1204.6463