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15 papers · 2 filters
Probing low-energy hyperbolic polaritons in van der Waals crystals with an electron microscope
Alexander A. Govyadinov, Andrea Konečná, Andrey Chuvilin +8
Van der Waals (vdW) materials exhibit intriguing structural, electronic and photonic properties. Electron Energy Loss Spectroscopy (EELS) within Scanning Transmission Electron Micr…
Effect of temperature on spin-transfer torque induced magnetic solitons
Sergi Lendínez, Jinting Hang, Saül Vélez +4
Spin-transfer torques in a nanocontact to an extended magnetic film can create spin waves that condense to form dissipative droplet solitons. Here we report an experimental study o…
Tunable sign change of spin Hall magnetoresistance in Pt/NiO/YIG structures
Dazhi Hou, Zhiyong Qiu, Joseph Barker +7
Spin Hall magnetoresistance (SMR) has been investigated in Pt/NiO/YIG structures in a wide range of temperature and NiO thickness. The SMR shows a negative sign below a temperature…
From tunneling to contact in a magnetic atom: the non-equilibrium Kondo effect
Deung-Jang Choi, Paula Abufager, Laurent Limot +1
A low-temperature scanning tunneling microscope was employed to study the differential conductance in an atomic junction formed by an adsorbed Co atom on a Cu(100) surface and a co…
Kondo resonance of a Co atom exchange coupled to a ferromagnetic tip
D. -J. Choi, S. Guissart, M. Ormaza +4
The Kondo effect of a Co atom on Cu(100) was investigated with a low-temperature scanning tunneling microscope using a monoatomically sharp nickel tip. Upon a tip-Co contact, the d…
Weak de-localization in graphene on a ferromagnetic insulating film
Luca Pietrobon, Lorenzo Fallarino, Andreas Berger +3
Graphene has been predicted to develop a magnetic moment by proximity effect when placed on a ferromagnetic film, a promise that could open exciting possibilities in the fields of…