Non-Reciprocal Zone Boundary Magnon Propagation in Cu$_2$OSeO$_3$
Institut Laue-Langevin (ILL)（朗之万研究所）；Max-Planck-Institut für Festkörperforschung（马克斯·普朗克固体研究所）；Technische Universität München (TUM)（慕尼黑工业大学）；Jülich Centre for Neutron Science (JCNS)（朱利希中子科学中心）；Forschungsneutronenquelle Heinz-Maier-Leibnitz (FRM-II)（海因茨·迈尔-莱布尼茨研究用中子源）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Zentrum für QuantumEngineering (ZQE)（量子工程中心）
Tobias Weber, Niclas Heinsdorf, Michal Stekiel, Paul Steffens, Andreas Schnyder, Christian Pfleiderer
Inelastic neutron scattering in the chiral magnet Cu$_2$OSeO$_3$ reveals strong non-reciprocal effects on magnon propagation at the boundary of the nuclear Brillouin zone. The non-reciprocal response is strongest at a central position between the zone corner and edge mid-point. We explain these results using an effective linear spin-wave model. While directional effects in chiral magnets have so far only been known to exist at low momenta close to the center of the Brillouin zone, the present study shows that non-reciprocity persists at the highest possible reduced momenta. The observed magnons show very little damping within the limits of our experimental resolution, making them of great interest for the fundamental research on compact, high-frequency magnonic applications.
Guangdong Ocean University（广东海洋大学）；Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）；Spallation Neutron Source Science Center（中国散裂中子源科学中心）；Sun Yat-Sen University（中山大学）；Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices（广东省磁电物理与器件重点实验室）；Research Center for Magnetoelectric Physics of Guangdong Province（广东省磁电物理研究中心）
GHz non-reciprocal optical conductivity in hematite ($α$-$\text{Fe}_2\text{O}_3$)
Technical University of Munich（慕尼黑工业大学）；TUM School of Natural Sciences（TUM自然科学学院）；Physics Department（物理系）；Institut für Theoretische Physik, Goethe-Universität Frankfurt（法兰克福歌德大学理论物理研究所）；Institut für Festkörpertheorie（固体理论研究所）；Wilhelm-Klemm-Straße 10（威廉-克莱姆大街10号）；Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften（巴伐利亚科学院瓦尔特·迈斯纳研究所）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Walter Schottky Institute（瓦尔特·肖特基研究所）
Observation of distorted tilted conical phase at the surface of a bulk chiral magnet with resonant elastic x-ray scattering
Technische Universität München（慕尼黑工业大学）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Center for Quantum Engineering (ZQE), Technical University Munich（慕尼黑工业大学量子工程中心）；University of Augsburg（奥格斯堡大学）
Raman signatures of a non-reciprocal magnetic phase transition in Ca$_2$RuO$_4$
University of Erlangen-Nürnberg（埃尔朗根-纽伦堡大学）；University of Trieste（的里雅斯特大学）；CNR-SPIN, University of Salerno（萨莱诺大学 CNR-SPIN 研究所）；Elettra Sincrotrone Trieste（的里雅斯特电子同步辐射中心）；CNR-Istituto Officina dei Materiali (IOM)（CNR 材料工坊研究所）
