Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Thomas Dahm"'
Autor:
Mirko Daumann, Thomas Dahm
Publikováno v:
New Journal of Physics, Vol 26, Iss 6, p 063001 (2024)
We study the broadening of initially localized wave packets in a quasi one-dimensional diamond ladder with interacting, spinless fermions. The lattice possesses a flat band causing localization. We place special focus on the transition away from the
Externí odkaz:
https://doaj.org/article/6fd3317290a2432f8b6ce8363f340d16
Autor:
Matthias Götte, Thomas Dahm
Publikováno v:
New Journal of Physics, Vol 21, Iss 12, p 123042 (2019)
The spin polarization of topological surface states is of high interest for possible applications in spintronics. At present, the only technique capable to measure the surface state spin texture is spin and angle resolved photoemission spectroscopy (
Externí odkaz:
https://doaj.org/article/fd3bd67c00234dbd8beac76397907468
Autor:
Savio Fabretti, Inga-Mareen Imort, Timo Kuschel, Thomas Dahm, Veerendra K. Guduru, Uli Zeitler, Andy Thomas
Publikováno v:
AIP Advances, Vol 4, Iss 3, Pp 037115-037115-6 (2014)
We investigated the magnetic anisotropy ratio of thin sputtered polycrystalline MgB2 films on MgO substrates. Using high magnetic field measurements, we estimated an anisotropy ratio of 1.35 for T = 0 K with an upper critical field of 31.74 T in the
Externí odkaz:
https://doaj.org/article/109e3c45f3c948e8b1df92df2607bc46
Publikováno v:
New Journal of Physics, Vol 16, Iss 3, p 033019 (2014)
We study the properties of the surface states in three-dimensional topological insulators in the presence of a ferromagnetic exchange field. We demonstrate that for layered materials like $\text{Bi}_2 \text{Se}_3$ the surface states on the top surfac
Externí odkaz:
https://doaj.org/article/4ec954c4665f47d4aae7f9f2c9280527
Autor:
Thomas Dahm, D J Scalapino
Publikováno v:
New Journal of Physics, Vol 16, Iss 2, p 023003 (2014)
Quasi-particle interference (QPI) measurements have provided a powerful tool for determining the momentum dependence of the gap of unconventional superconductors. Here we examine the possibility of using such measurements to probe the frequency and m
Externí odkaz:
https://doaj.org/article/742612436b95494c926876b0cbf057a8
Autor:
Igor Sapina, Thomas Dahm
Publikováno v:
New Journal of Physics, Vol 15, Iss 7, p 073035 (2013)
We study center-of-mass oscillations of a dipolar Bose–Einstein condensate in the vicinity of a superconducting surface. We show that the magnetic field of the magnetic dipoles induces eddy currents in the superconductor, which act back on the Bose
Externí odkaz:
https://doaj.org/article/6c3b37add03d4c199dc150a7f9c605e0
Publikováno v:
Zeitschrift für Naturforschung A. 75:393-402
In this paper, we have studied spinless fermions in four specific quasi one-dimensional systems that are known to host flat bands in the noninteracting limit: the triangle lattice, the stub lattice, the diamond lattice, and the diamond lattice with t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be50a5bf3eb8295442d66b8328ae9b84
https://doi.org/10.1515/zna-2019-0371
https://doi.org/10.1515/zna-2019-0371
Autor:
Thomas Dahm, Matthias Götte
Determining the detailed spin texture of topological surface states is important when one wants to apply topological insulators in spintronic devices. In principle, the in-plane spin component of the surface states can be measured by a method analogo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fe6428dda4143d2a150e703cbf7f5e8
http://arxiv.org/abs/2004.07010
http://arxiv.org/abs/2004.07010
We consider two mutually interacting fermionic particle species on a one-dimensional lattice and study how the mass ratio $\eta$ between the two species affects the (equilibration) dynamics of the particles. Focussing on the regime of strong interact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fa6392d25b01d44c73e5b9f8fd92ec8