Zobrazeno 1 - 10
of 698
pro vyhledávání: '"Jacobsen, P. H."'
We show strong coupling between antiferromagnetic magnons and microwave cavity photons at both high and externally controllable magnon frequencies. Using the fully quantum mechanical path-integral method, we study an antiferromagnetic insulator (AFM)
Externí odkaz:
http://arxiv.org/abs/2410.14780
The geometrical properties of a helical ferromagnet are shown theoretically to control the critical temperature of a proximity-coupled superconductor. Using the Usadel equation for diffusive spin transport, we provide self-consistent analysis of how
Externí odkaz:
http://arxiv.org/abs/2404.05798
Publikováno v:
Phys. Rev. B 110, L161102 (2024)
We study the effect of ferromagnetic metals (FM) on the circularly polarized modes of an electromagnetic cavity and show that broken time-reversal symmetry leads to a dichroic response of the cavity modes. With one spin-split band, the Zeeman couplin
Externí odkaz:
http://arxiv.org/abs/2401.01929
Autor:
Skarpeid, Alv Johan, Hugdal, Henning G., Salamone, Tancredi, Amundsen, Morten, Jacobsen, Sol H.
Publikováno v:
J. Phys.: Condens. Matter 36 235302 (2024)
We show that tailoring the geometric curvature profile of magnets can be used for bespoke design of an effective non-relativistic spin-orbit coupling, which may be used to control proximity effects if the magnet is coupled to a superconductor. We con
Externí odkaz:
http://arxiv.org/abs/2312.06774
We propose that geometric curvature and torsion may be used to probe the quality of an uncompensated antiferromagnetic interface, using the proximity effect. We study a helix of antiferromagnetic wire coupled to a conventional superconductor, and sho
Externí odkaz:
http://arxiv.org/abs/2311.12116
Publikováno v:
A. T. G. Janss{\o}nn, H. G. Hugdal, A. Brataas, S. H. Jacobsen, Phys. Rev. B 107, 035147 (2023)
A recent proof of concept showed that cavity photons can mediate superconducting (SC) signatures to a ferromagnetic insulator (FI) over a macroscopic distance [Phys. Rev. B, 102, 180506(R) (2020)]. In contrast with conventional proximity systems, thi
Externí odkaz:
http://arxiv.org/abs/2209.09308
When applying an external magnetic field to a superconductor, orbital and Pauli paramagnetic pairbreaking effects govern the limit of the upper critical magnetic field that can be supported before superconductivity breaks down. Experimental studies h
Externí odkaz:
http://arxiv.org/abs/2208.04338
Coupling a conventional s-wave superconductor to a ferromagnet allows, via the proximity effect, to generate superconducting triplet correlations. This feature can be employed to achieve a superconducting triplet spin-valve effect in superconductor-f
Externí odkaz:
http://arxiv.org/abs/2112.12797
Publikováno v:
Phys. Rev. B 103, 060505 (2021)
Due to the lack of a net magnetization both at the interface and in the bulk, antiferromagnets with compensated interfaces may appear incapable of influencing the phase transition in an adjacent superconductor via the spin degree of freedom. We here
Externí odkaz:
http://arxiv.org/abs/2010.02223