12.12.2017 – Visit to the University of Twente

Kriti, Jairo and Paul in a transport meeting.

Seminar of Jairo Sinova in Twente the 12.12.2017

Prof. Jairo Sinova and Bertrand Dupé are visiting the group of Prof. Paul Kelly at the University of Twente for a couple of days. It is a pleasure to visit the group of Prof. Kelly and benefit from his long experience in spin transport calculations from ab initio.

 

07.11.2017 – Visit of Dr. Oliver Breunig

We welcome today Dr. Oliver Breunig from the Institute of Physics II at the University of Cologne, hosted by TWIST. He will give a talk on “Gigantic Negative Magnetoresistance in a Disordered Topological Insulator”.

Details: “Recently the phenomenon of negative magnetoresistance (MR) is attracting renewed interest due to its occurrence in Weyl semimetals because of the chiral anomaly. In other systems a large MR typically relates to magnetism. In this talk a novel mechanism leading to a large negative MR will be presented that is based not on magnetism, but on disorder. In the newly synthesized bulkinsulating topological insulator material T1BixSb1-xTe2 we find a suppression of the resistivity by up to 98 % in 14 T at low temperature. From transport data and numerical simulations, this gigantic negative MR is understood by a percolation of charge puddles formed in the disordered bulk.”

Click here to see the announcement.

01.07.2017 – Two-month stay of guest scientist Joo-Von Kim

Joo-Von Kim from the Centre for Nanoscience and Nanotechnology/CNRS/Université Paris-Sud in Orsay arrived for his two-month stay as a guest scientist in the INSPIRE group. He will use his expertise in micromagnetic simulations to work with Bertrand Dupé on the coupled motion of (anti)skyrmion pairs in magnetic ultrathin films ("Skyrmion Tango"). His stay is financially supported by the DAAD.

04.07.2017 – Seminar given by Filipe Guimarães

Today, we have the pleasure to welcome Filipe Guimarães from Forschungszentrum Jülich as our speaker. He will talk about "Dynamical amplification of magnetoresistances and Hall currents up to the THz regime" and stay with us until tomorrow for more discussions about the tight-binding method and modeling of spin transport phenomena.

26.06.2017 – Visit of Nadine Hauptmann

This week, we welcome Nadine Hauptmann from Radboud University in Nijmegen as our seminar guest. She is a specialist in scanning probe microscopy and works in the group of Alexander Khajetoorians. We are looking forward to her presentation about the new probing capabilities of SPEX (spin-polarized scanning tunneling microscopy combined with magnetic exchange force microscopy) applied to the ultrathin film system Fe/Ir(111), where nano-skyrmions or spin spirals occur depending on the number of Fe-layers.