Zobrazeno 1 - 10
of 384
pro vyhledávání: '"Ernst Wolfgang E."'
Autor:
Heim Pascal, Rumetshofer Michael, Thaler Bernhard, Ernst Wolfgang E., von der Linden Wolfgang, Koch Markus
Publikováno v:
EPJ Web of Conferences, Vol 205, p 09025 (2019)
We describe a Bayesian formalism to analyse femtosecond pump-probe photoionization experiments with photoelectron-photoion coincidence (PEPICO) detection. This approach overcomes the drawback of extraordinary long data acquisition times of PEPICO det
Externí odkaz:
https://doaj.org/article/5f835ca97ca54500a1e46036c76a38df
Publikováno v:
EPJ Web of Conferences, Vol 205, p 05023 (2019)
Photoexcitation of atoms solvated inside superfluid helium nanodroplets is investigated with femtosecond photoelectron spectroscopy. Expansion of the solvation shell within about 600 fs is observed as transient photoelectron peak shift. For larger ph
Externí odkaz:
https://doaj.org/article/81f1099f4b9440a7a837821c49c93d6e
Autor:
Lackner, Florian, Ernst, Wolfgang E.
Publikováno v:
J. Phys. Chem. Lett. 2018, 9, 13, 3561
Besides the use as cold matrix for spectroscopic studies, superfluid helium droplets have served as a cold environment for the synthesis of molecules and clusters. Since vibrational frequencies of molecules in helium droplets exhibit almost no shift
Externí odkaz:
http://arxiv.org/abs/2209.15464
Autor:
Ruckhofer, Adrian, Sacchi, Marco, Payne, Anthony, Jardine, Andrew P., Ernst, Wolfgang E., Avidor, Nadav, Tamtögl, Anton
Large-area single-crystal monolayers of two-dimensional (2D) materials such as graphene and hexagonal boron nitride (h-BN) can be grown by chemical vapour deposition (CVD). However, the high temperatures and fast timescales at which the conversion fr
Externí odkaz:
http://arxiv.org/abs/2201.06440
While parallel segments in the Fermi level contours, often found at the surfaces of topological insulators (TIs) would imply "strong" nesting conditions, the existence of charge density waves (CDWs) - periodic modulations of the electron density - ha
Externí odkaz:
http://arxiv.org/abs/2111.02323
Autor:
Ruckhofer, Adrian, Campi, Davide, Bremholm, Martin, Hofmann, Philip, Bendek, Giorgio, Bernasconi, Marco, Ernst, Wolfgang E., Tamtögl, Anton
Publikováno v:
Phys. Rev. Research 2, 023186 (2020)
We present a combined experimental and theoretical study of the surface vibrational modes of the topological insulator (TI) Bi$_2$Se$_3$ with particular emphasis on the low-energy region below 10 meV that has been difficult to resolve experimentally.
Externí odkaz:
http://arxiv.org/abs/1907.01864
Autor:
Heim, Pascal, Rumetshofer, Michael, Ranftl, Sascha, Thaler, Bernhard, Ernst, Wolfgang E., Koch, Markus, von der Linden, Wolfgang
Publikováno v:
Entropy 2019, 21(1), 93
This paper employs Bayesian probability theory for analyzing data generated in femtosecond pump-probe photoelectron-photoion coincidence (PEPICO) experiments. These experiments allow investigating ultrafast dynamical processes in photoexcited molecul
Externí odkaz:
http://arxiv.org/abs/1901.06933
Autor:
Thaler, Bernhard, Ranftl, Sascha, Heim, Pascal, Cesnik, Stefan, Treiber, Leonhard, Meyer, Ralf, Hauser, Andreas W., Ernst, Wolfgang E., Koch, Markus
Publikováno v:
Nature Communications (2018) 9:4006
The observation of chemical reactions on the time scale of the motion of electrons and nuclei has been made possible by lasers with ever shortened pulse lengths. Superfluid helium represents a special solvent that permits the synthesis of novel class
Externí odkaz:
http://arxiv.org/abs/1804.04497
Autor:
Tamtögl, Anton, Pusterhofer, Michael, Bremholm, Martin, Hedegaard, Ellen M. J., Iversen, Bo B., Hofmann, Philip, Ellis, John, Allison, William, Miret-Artés, S., Ernst, Wolfgang E.
We have determined an atom-surface interaction potential for the He$-$Bi$_2$Te$_3$(111) system by analysing ultrahigh resolution measurements of selective adsorption resonances. The experimental measurements were obtained using $^3$He spin-echo spect
Externí odkaz:
http://arxiv.org/abs/1802.06605
Autor:
Tamtögl, Anton, Sacchi, Marco, Calvo-Almazán, Irene, Zbiri, Mohamed, Koza, Marek M., Ernst, Wolfgang E., Fouquet, Peter
Publikováno v:
Carbon 126, 23 (2018)
We present a combined experimental and theoretical study of the self-diffusion of ammonia on exfoliated graphite. Using neutron time-of-flight spectroscopy we are able to resolve the ultrafast diffusion process of adsorbed ammonia, NH$_3$, on graphit
Externí odkaz:
http://arxiv.org/abs/1710.00740