Zobrazeno 1 - 10
of 1 287
pro vyhledávání: '"Schulenburg, J."'
Autor:
Schneidmiller, E. A., Macias, I. J. Bermudez, Beye, M., Braune, M., Czwalinna, M. -K., Duesterer, S., Faatz, B., Ivanov, R., Jastrow, F., Kuhlmann, M., Roensch-Schulenburg, J., Schreiber, S., Sorokin, A., Tiedtke, K., Yurkov, M. V., Zemella, J.
FLASH is the first soft X-ray FEL user facility, routinely providing brilliant photon beams for users since 2005. The second undulator branch of this facility, FLASH2, is gap-tunable which allows to test and use advanced lasing concepts. In particula
Externí odkaz:
http://arxiv.org/abs/2211.07426
Publikováno v:
Condens. Matter Phys., 2020, vol. 23, No. 4, 43710
In contrast to strongly frustrated classical systems, their quantum counterparts typically have a non-degenerate ground state. A counterexample is the celebrated Heisenberg sawtooth spin chain with ferromagnetic zigzag bonds $J_1$ and competing antif
Externí odkaz:
http://arxiv.org/abs/2009.05809
Publikováno v:
Phys. Rev. Lett. 125, 117207 (2020)
We present numerical evidence for the crystallization of magnons below the saturation field at non-zero temperatures for the highly frustrated spin-half kagome Heisenberg antiferromagnet. This phenomenon can be traced back to the existence of indepen
Externí odkaz:
http://arxiv.org/abs/1910.10448
Publikováno v:
Phys. Rev. B 98 (2018), 224402
The interplay between lattice topology, frustration, and spin quantum number, $s$, is explored for the Heisenberg antiferromagnet (HAFM) on the eleven two-dimensional Archimedean lattices (square, honeycomb, CaVO, SHD, SrCuBO, triangle, bounce, trell
Externí odkaz:
http://arxiv.org/abs/1811.04229
Publikováno v:
Phys. Rev. B 98, 094423 (2018)
For the paradigmatic frustrated spin-half Heisenberg antiferromagnet on the kagome lattice we performed large-scale numerical investigation of thermodynamic functions by means of the finite-temperature Lanczos method for system sizes of up to N=42. W
Externí odkaz:
http://arxiv.org/abs/1806.05541
Autor:
Schneidmiller, E. A., Faatz, B., Kuhlmann, M., Roensch-Schulenburg, J., Schreiber, S., Tischer, M., Yurkov, M. V.
Harmonic lasing is a perspective mode of operation of X-ray FEL user facilities that allows to provide brilliant beams of higher energy photons for user experiments. Another useful application of harmonic lasing is so called Harmonic Lasing Self-Seed
Externí odkaz:
http://arxiv.org/abs/1612.03635
Autor:
Jönsson, Bengt, Hampson, Grace, Michaels, Jonathan, Towse, Adrian, von der Schulenburg, J.-Matthias Graf, Wong, Olivier
Publikováno v:
The European Journal of Health Economics, 2019 Apr 01. 20(3), 427-438.
Externí odkaz:
https://www.jstor.org/stable/45156929
Publikováno v:
Phys. Rev. B 85, 224424 (2012)
Using the coupled cluster method for high orders of approximation and Lanczos exact diagonalization we study the ground-state phase diagram of a quantum spin-1/2 J1-J2 model on the square lattice with plaquette structure. We consider antiferromagneti
Externí odkaz:
http://arxiv.org/abs/1205.0681