Antiferromagnets possess long-range magnetic order without any net magnetization, showcasing remarkably swift dynamics, often in the THz range. These materials display intriguing spin transport characteristics, including anomalous Hall effect, spin-orbit-free unconventional Hall effects, and highly anisotropic spin-polarization. Our theoretical investigations of these effects are conducted through close collaboration with experimentalists.
Topological quantum materials constitute a distinct class of compounds with electronic band structures that set them apart from conventional metals and insulators. Their topologically nontrivial electronic configurations give rise to a plethora of captivating properties, encompassing topologically protected states, characterized by remarkable mobility and spin-momentum coupling, along with diverse quantum Hall effects, axionic phenomena, and Majorana modes.
Two-dimensional materials have become an incredibly captivating platform for cutting-edge electronics and spintronics. Notably, heterostructures incorporating van der Waals magnets exhibit spin-charge interconversion, spin-orbit torques, and Dzyaloshinskii-Moriya interactions with symmetries not commonly encountered in conventional transition metal thin films. From ab-initio calculations, we delve into the essence of these distinct effects.
Undoubtedly, the growing fascination with semiconductor surface physics can be attributed to the challenges faced by solid-state physicists in comprehending the characteristics of semiconductor structures influenced by surface treatments and surrounding environments. The significance of the surface boundary becomes apparent when contrasting the considerable variation in sensitivity between metals and semiconductors.