In: Hyperfine Interactions, 2015, vol. 233, no. 1-3, p. 67-73
|
In: Space Science Reviews, 2015, vol. 188, no. 1-4, p. 141-185
|
In: Nature Communications, 2020, vol. 11, no. 1, p. 1–9
Recent findings of new Higgs modes in unconventional superconductors require a classification and characterization of the modes allowed by nontrivial gap symmetry. Here we develop a theory for a tailored nonequilibrium quantum quench to excite all possible oscillation symmetries of a superconducting condensate. We show that both a finite momentum transfer and quench symmetry allow for an...
|
In: The Cryosphere, 2019, vol. 13, no. 9, p. 2439–2456
The DC resistivity method is a common tool in periglacial research because it can delineate zones of large resistivities, which are often associated with frozen water. The interpretation can be ambiguous, however, because large resistivities may also have other causes, like solid dry rock. One possibility to reduce the ambiguity is to measure the frequency-dependent resistivity. At low...
|
In: Physical Review B, 2019, vol. 99, no. 15, p. 155107
We investigate the excited state electronic structure of the model phase transition system In/Si(111) using femtosecond time- and angle-resolved photoemission spectroscopy (trARPES). An extreme ultraviolet 500 kHz laser source at 21.7 eV is utilized both to map the energy of excited states above the Fermi level and follow the momentum-resolved population dynamics on a femtosecond timescale....
|
In: Review of Scientific Instruments, 2019, vol. 90, no. 2, p. 023104
Time- and angle-resolved photoemission spectroscopy (trARPES) employing a 500 kHz extreme-ultraviolet light source operating at 21.7 eV probe photon energy is reported. Based on a high-power ytterbium laser, optical parametric chirped pulse amplification, and ultraviolet-driven high-harmonic generation, the light source produces an isolated high-harmonic with 110 meV bandwidth and a flux of...
|
In: Science, 2018, vol. 362, no. 6416, p. 821–825
Ultrafast nonequilibrium dynamics offer a route to study the microscopic interactions that govern macroscopic behavior. In particular, photoinduced phase transitions (PIPTs) in solids provide a test case for how forces, and the resulting atomic motion along a reaction coordinate, originate from a nonequilibrium population of excited electronic states. Using femtosecond photoemission, we...
|
In: The European Physical Journal D, 2010, vol. 57, no. 1, p. 105-110
|
In: Celestial Mechanics and Dynamical Astronomy, 2006, vol. 94, no. 4, p. 369-379
|
In: General Relativity and Gravitation, 2009, vol. 41, no. 4, p. 743-755
|