Continuous wave optically and electrically detected magnetic resonance spectroscopy (cwODMR/cwEDMR) allow the investigation of paramagnetic states involved in spin-dependent transitions, like recombination and transport. Although experimentally similar to conventional electron spin resonance (ESR), there exist limitations when applying models originally developed for ESR to observables (luminescence and electric current) of cwODMR and cwEDMR. Here we present closed-form solutions for the modulation frequency dependence of cwODMR and cwEDMR based on an intermediate pair recombination model and discuss ambiguities which arise when attempting to distinguish the dominant spin-dependent processes underlying experimental data. These include: 1) a large number of quantitatively different models cannot be differentiated, 2) signs of signals are determined not only by recombination, but also by other processes like dissociation, intersystem-crossing, pair generation, and even experimental parameter such as, modulation frequency, microwave power, and temperature, 3) radiative and non-radiative recombination cannot be distinguished due to the observed signs of cwODMR and cwEDMR experiments.
Electrically and optically active charge carrier traps in silicon-doped few-layer GaSe
Walter-Schottky-Institut and TUM School of Natural Sciences, Technische Universität München（慕尼黑工业大学瓦尔特-肖特基研究所与自然科学学院）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；Department of Chemistry, Ludwig-Maximilians-Universität München（慕尼黑大学化学系）；Department of Inorganic Chemistry, University of Chemistry and Technology Prague（布拉格化工大学无机化学系）；School of Materials Science and Engineering, Jilin University（吉林大学材料科学与工程学院）；Institute of Physics and Astronomy, Technical University Berlin（柏林工业大学物理与天文研究所）
Optically driven collective spin excitations and magnetization dynamics in the Néel-type skyrmion host GaV$_4$S$_8$
GaV $_4$ S $_8$是一种多铁性半导体，具有磁性摆线（Cyc）和Néel型Skyrmion晶格（SkL）相，具有广泛的热稳定性和磁稳定性。在这里，我们使用时间分辨的磁光克尔光谱和微磁模拟来证明在Cyc和SkL阶段由单轴各向异性的光致调制驱动的集体自旋激发的相干产生。我们的研究结果揭示了自旋动力学在各向异性材料托管skyrmions和铺平了一条新的途径，其磁秩序的光学控制。
