Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Streib, Simon"'
Autor:
Lu, Zhiwei, Miranda, I. P., Streib, Simon, Xu, Qichen, Cheenikundil, Rajgowrav, Pereiro, Manuel, Sjöqvist, Erik, Eriksson, Olle, Bergman, Anders, Thonig, Danny, Delin, Anna
The impact of the local chemical environment on the Gilbert damping in the binary alloy Fe$_{100-x}$Co$_{x}$ is investigated, using computations based on density functional theory. By varying the alloy composition x as well as Fe/Co atom positions we
Externí odkaz:
http://arxiv.org/abs/2405.02494
Autor:
Cardias, Ramon, Streib, Simon, Lu, Zhiwei, Pereiro, Manuel, Bergman, Anders, Sjöqvist, Erik, Barreteau, Cyrille, Delin, Anna, Eriksson, Olle, Thonig, Danny
We developed a method which performs the coupled adiabatic spin and lattice dynamics based on the tight-binding electronic structure model, where the intrinsic magnetic field and ionic forces are calculated from the converged self-consistent electron
Externí odkaz:
http://arxiv.org/abs/2311.00765
Autor:
Streib, Simon, Cardias, Ramon, Pereiro, Manuel, Bergman, Anders, Sjöqvist, Erik, Delin, Anna, Eriksson, Olle, Thonig, Danny
The spectrum of magnon excitations in magnetic materials can be obtained exactly from the transverse dynamic magnetic susceptibility, which is however in practice numerically expensive. Many ab initio approaches therefore consider instead the adiabat
Externí odkaz:
http://arxiv.org/abs/2302.10958
Autor:
Lu, Zhiwei, Miranda, I. P., Streib, Simon, Pereiro, Manuel, Sjöqvist, Erik, Eriksson, Olle, Bergman, Anders, Thonig, Danny, Delin, Anna
We study the influence of non-local damping on magnon properties of Fe, Co, Ni and Fe$_{1-x}$Co$_{x}$ ($x=30\%,50\%$) alloys. The Gilbert damping parameter is typically considered as a local scalar both in experiment and in theoretical modelling. How
Externí odkaz:
http://arxiv.org/abs/2211.13486
Autor:
Liu, Yuefei, Bagrov, Andrey, Bergman, Anders, Delin, Anna, Eriksson, Olle, Pereiro, Manuel, Streib, Simon, Thonig, Danny, Sjöqvist, Erik, Azimi-Mousolou, Vahid
Publikováno v:
New J. Phys. 25 113032 (2023)
We report the existence of entangled steady-states in bipartite quantum magnonic systems at elevated temperatures. We consider dissipative dynamics of two magnon modes in a bipartite antiferromagnet, subjected to interaction with a phonon mode and an
Externí odkaz:
http://arxiv.org/abs/2209.01032
Autor:
Streib, Simon, Cardias, Ramon, Pereiro, Manuel, Bergman, Anders, Sjöqvist, Erik, Barreteau, Cyrille, Delin, Anna, Eriksson, Olle, Thonig, Danny
Publikováno v:
Phys. Rev. B 105, 224408 (2022)
We consider an implementation of the adiabatic spin dynamics approach in a tight-binding description of the electronic structure. The adiabatic approximation for spin-degrees of freedom assumes that the faster electronic degrees of freedom are always
Externí odkaz:
http://arxiv.org/abs/2203.11759
Publikováno v:
Phys. Rev. B 104, 014403 (2021)
We derive boundary conditions at the interfaces of magnetoelastic heterostructures under ferromagnetic resonance for arbitrary magnetization directions and interface shapes. We apply our formalism to magnet$\vert$nonmagnet bilayers and magnetic grain
Externí odkaz:
http://arxiv.org/abs/2104.05992
Autor:
Streib, Simon, Szilva, Attila, Borisov, Vladislav, Pereiro, Manuel, Bergman, Anders, Sjöqvist, Erik, Delin, Anna, Katsnelson, Mikhail I., Eriksson, Olle, Thonig, Danny
Publikováno v:
Phys. Rev. B 103, 224413 (2021)
We consider the mapping of tight-binding electronic structure theory to a local spin Hamiltonian, based on the adiabatic approximation for spin degrees of freedom in itinerant-electron systems. Local spin Hamiltonians are introduced in order to descr
Externí odkaz:
http://arxiv.org/abs/2103.04726
Autor:
Streib, Simon
Publikováno v:
Phys. Rev. B 103, 100409 (2021)
In condensed matter systems it is necessary to distinguish between the momentum of the constituents of the system and the pseudomomentum of quasiparticles. The same distinction is also valid for angular momentum and pseudoangular momentum. Based on N
Externí odkaz:
http://arxiv.org/abs/2010.15616
Autor:
Streib, Simon, Borisov, Vladislav, Pereiro, Manuel, Bergman, Anders, Sjöqvist, Erik, Delin, Anna, Eriksson, Olle, Thonig, Danny
Publikováno v:
Phys. Rev. B 102, 214407 (2020)
It is generally accepted that the effective magnetic field acting on a magnetic moment is given by the gradient of the energy with respect to the magnetization. However, in ab initio spin dynamics within the adiabatic approximation, the effective fie
Externí odkaz:
http://arxiv.org/abs/2008.12547