Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Haldar, Soumyajyoti"'
Autor:
Haldar, Soumyajyoti, Heinze, Stefan
Using density functional theory (DFT), we calculate the magnetic short-ranged exchange forces between a magnetic tip and an adatom adsorbed on the antiferromagnetic Mn monolayer on the W(110) surface [Mn/W(110)]. These exchange forces can be measured
Externí odkaz:
http://arxiv.org/abs/2407.11732
Autor:
Zahner, Felix, Haldar, Soumyajyoti, Wiesendanger, Roland, Heinze, Stefan, von Bergmann, Kirsten, Kubetzka, André
Diffusion on surfaces is a fundamental process in surface science, governing nanostructure and film growth, molecular self-assembly, and chemical reactions. Atom motion on non-magnetic surfaces has been studied extensively both theoretically and by r
Externí odkaz:
http://arxiv.org/abs/2405.20472
Autor:
Li, Dongzhe, Haldar, Soumyajyoti, Kollwitz, Leo, Schrautzer, Hendrik, Goerzen, Moritz A., Heinze, Stefan
Publikováno v:
Phys. Rev. B 109, L220404 (2024)
Using first-principles calculations and atomistic spin simulations, we predict stable isolated skyrmions with a diameter below 10 nm in a monolayer of the two-dimensional van der Waals ferromagnet Fe$_5$GeTe$_2$, a material of significant experimenta
Externí odkaz:
http://arxiv.org/abs/2401.18000
Publikováno v:
Nano Letters (2014)
A major challenge for magnetic skyrmions in atomically thin van der Waals (vdW) materials is reliable skyrmion detection. Here, based on rigorous first-principles calculations, we show that all-electrical skyrmion detection is feasible in 2D vdW magn
Externí odkaz:
http://arxiv.org/abs/2309.03828
Autor:
Nickel, Felix, Kubetzka, André, Haldar, Soumyajyoti, Wiesendanger, Roland, Heinze, Stefan, von Bergmann, Kirsten
Publikováno v:
Phys. Rev. B 108, L180411 (2023)
We identify the triple-Q (3Q) state as magnetic ground state in Pd/Mn and Rh/Mn bilayers on Re(0001) using spin-polarized scanning tunneling microscopy and density functional theory. An atomistic model reveals that in general the 3Q state with tetrah
Externí odkaz:
http://arxiv.org/abs/2307.09764
We study the emergence of spontaneous skyrmion lattices in an Fe monolayer in fcc and hcp stacking on the Ir(111) surface using density functional theory (DFT). For fcc-Fe/Ir(111) we find the well-known square nanoskyrmion lattice. However, for hcp-F
Externí odkaz:
http://arxiv.org/abs/2301.13851
Publikováno v:
Phys. Rev. B 107, 104428 (2023)
We investigate the impact of mechanical strain, stacking order, and external electric fields on the magnetic interactions of a two-dimensional (2D) van der Waals (vdW) heterostructure in which a 2D ferromagnetic metallic Fe$_3$GeTe$_2$ monolayer is d
Externí odkaz:
http://arxiv.org/abs/2210.15351
Publikováno v:
Nano Lett. 22, 7706-7713 (2022)
Magnetic skyrmions $-$ localized chiral spin structures $-$ show great promise for spintronic applications. The recent discovery of two-dimensional (2D) magnetic materials opened new opportunities for exploring such topological spin structures in ato
Externí odkaz:
http://arxiv.org/abs/2208.09210
Autor:
Gutzeit, Mara, Kubetzka, André, Haldar, Soumyajyoti, Pralow, Henning, Wiesendanger, Roland, Heinze, Stefan, von Bergmann, Kirsten
Complex magnetic order arises due to the competition of different interactions between the magnetic moments. Recently, there has been an increased interest in such states not only to unravel the fundamental physics involved, but also with regards to
Externí odkaz:
http://arxiv.org/abs/2204.01358
We demonstrate that topological-chiral magnetic interactions can play a key role for magnetic ground states in ultrathin films at surfaces. Based on density functional theory we show that significant chiral-chiral interactions occur in hexagonal Mn m
Externí odkaz:
http://arxiv.org/abs/2106.08622