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Verena Brehm Brehm

As seen in: Physical Review B
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Articles

Topological magnon gap engineering in van der Waals ${\mathrm{CrI}}_{3}$ ferromagnets

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By Verena Brehm Brehm, Jostein N. Kløgetvedt, Basque Country, Pawel Sobieszczyk
| Physical Review B
The microscopic origin of the topological magnon band gap in CrI3 ferromagnets has been a subject of controversy for years since two main models with distinct characteristics, i.e., Dzyaloshinskii-Moriya (DM) and Kitaev, provided possible explanations with different outcome implications. Here, we investigate the angular magnetic field dependence of the magnon gap of CrI3 by elucidating what main contributions play a major role in its generation.
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Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators

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By Verena Brehm Brehm, Olena Gomonay, Johannes Gutenberg-University Mainz, Serban Lepadatu
| Physical Review B
Abstract Magnon eigenmodes in easy-plane antiferromagnetic insulators are linearly polarized and are not expected to carry any net spin angular momentum. Motivated by recent nonlocal spin transport experiments in the easy-plane phase of hematite, we perform a series of micromagnetic simulations in a nonlocal geometry at finite temperatures. We show that by tuning an external magnetic field, we can control the magnon eigenmodes and the polarization of the spin transport signal in these systems.
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Influence of hole transport material ionization energy on the performance of perovskite solar cells

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By Nikolaos Droseros, Demetra Tsokkou, Verena Brehm Brehm
| Royal Society of Chemistry Verified
B. Dänekamp, N. Droseros, D. Tsokkou, V. Brehm, P. P. Boix, M. Sessolo, N. Banerji and H. J. Bolink, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC05372C If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using Copyright Clearance Center. Go to our Instructions for using Copyright Clearance Center page for details.
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