Zobrazeno 1 - 10
of 248
pro vyhledávání: '"U. Bovensiepen"'
Autor:
J. D. Rameau, S. Freutel, A. F. Kemper, M. A. Sentef, J. K. Freericks, I. Avigo, M. Ligges, L. Rettig, Y. Yoshida, H. Eisaki, J. Schneeloch, R. D. Zhong, Z. J. Xu, G. D. Gu, P. D. Johnson, U. Bovensiepen
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-9 (2016)
Differentiation of quantum interactions in correlated materials is ambiguous in measurements of the single particle self-energy. Here, Rameau et al. employ a combined theoretical and experimental time domain treatment to separate electron-boson inter
Externí odkaz:
https://doaj.org/article/e22c35742c724c8590043d4166ddd150
Autor:
V. Tinnemann, C. Streubühr, B. Hafke, T. Witte, A. Kalus, A. Hanisch-Blicharski, M. Ligges, P. Zhou, D. von der Linde, U. Bovensiepen, M. Horn-von Hoegen
Publikováno v:
Structural Dynamics, Vol 6, Iss 6, Pp 065101-065101-5 (2019)
Ultrafast reflection high-energy electron diffraction is employed to follow the lattice excitation of a Bi(111) surface upon irradiation with a femtosecond laser pulse. The thermal motion of the atoms is analyzed through the Debye–Waller effect. Wh
Externí odkaz:
https://doaj.org/article/8817398fa60a494b9c0b8b6aa128cc07
Autor:
V. Tinnemann, C. Streubühr, B. Hafke, A. Kalus, A. Hanisch-Blicharski, M. Ligges, P. Zhou, D. von der Linde, U. Bovensiepen, M. Horn-von Hoegen
Publikováno v:
Structural Dynamics, Vol 6, Iss 3, Pp 035101-035101-9 (2019)
The lattice response of a Bi(111) surface upon impulsive femtosecond laser excitation is studied with time-resolved reflection high-energy electron diffraction. We employ a Debye–Waller analysis at large momentum transfer of 9.3 Å−1 ≤ Δ k ≤
Externí odkaz:
https://doaj.org/article/ba790007fdf94476a73c45b5be73b31b
Autor:
L. Rettig, R. Cortés, J.-H. Chu, I. R. Fisher, F. Schmitt, R. G. Moore, Z.-X. Shen, P. S. Kirchmann, M. Wolf, U. Bovensiepen
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Whilst excited electronic states may exhibit unique non-equilibrium behavior, order is inhibited by fluctuations. Here, the authors use femtosecond photoemission spectroscopy to demonstrate transient stabilization of charge density wave order in rare
Externí odkaz:
https://doaj.org/article/b4928ff830564d4ca4e87e43d69e15fb
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 022046 (2020)
Employing time-resolved photoelectron spectroscopy we analyze the relaxation dynamics of hot electrons in the charge density wave/Mott material 1T-TaS_{2}. At 1.2 eV above the Fermi level we observe a hot electron lifetime of 12±5 fs in the metallic
Externí odkaz:
https://doaj.org/article/1b19dd85b067468c80da19a2012ce97f
Akademický článek
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Autor:
C. Bertram, D. P. Miller, Chr. Schunke, I. Kemeny, M.W. Kimura, U. Bovensiepen, E. Zurek, K. Morgenstern
Publikováno v:
Eva Zurek
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94c6fb4f0422849ab624708902cebaf7
https://doi.org/10.1021/acs.jpcc.1c08045
https://doi.org/10.1021/acs.jpcc.1c08045
The transport of optically excited, hot electrons in heterostructures is analyzed by femtosecond, time-resolved two-photon photoelectron emission spectroscopy (2PPE) for epitaxial Au/Fe/MgO(001). We compare the temporal evolution of the 2PPE intensit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e84830997aeaa69e903738510e8cc332
Autor:
J, Thomas, C, Bertram, J, Daru, J, Patwari, I, Langguth, P, Zhou, D, Marx, K, Morgenstern, U, Bovensiepen
Publikováno v:
Physical review letters. 127(26)
Microscopic insight into interactions is a key for understanding the properties of heterogenous interfaces. We analyze local attraction in noncovalently bonded Xe-Cs^{+} aggregates and monolayers on Cu(111) as well as repulsion upon electron transfer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::98aac1ba681e0e43fc99a102482b44ad
https://pubmed.ncbi.nlm.nih.gov/35029471
https://pubmed.ncbi.nlm.nih.gov/35029471
Publikováno v:
New Journal of Physics, Vol 18, Iss 9, p 093028 (2016)
Using femtosecond time- and angle-resolved photoemission spectroscopy we investigate the effect of electron doping on the electron dynamics in $\mathrm{Ba}{({\mathrm{Fe}}_{1-x}{\mathrm{Co}}_{x})}_{2}{\mathrm{As}}_{2}$ in a range of $0\leqslant x\lt 0
Externí odkaz:
https://doaj.org/article/be43053a26a241d59916230f55ef3668