Publications by authors named "Chuenhou Ouyang"
Although strain underpins the behavior of many transition-oxide-based magnetic nanomaterials, it is elusive to quantify. Since the formation of orbital molecules is sensitive to strain, a metal-insulator transition should be a window into nanocrystallite strain. Using three sizes of differently strained Fe O polycrystalline nanorods, the impact of strain on the Verwey transition and the associated formation and dissolution processes of quasiparticle trimerons is tracked.
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- Nanoelectronics using two-dimensional (2D) materials face challenges due to contact issues with semiconducting monolayers, particularly in creating p-type transistors with low Schottky barriers.
- Tungsten selenides (WSe) have shown promise for p-type transistors but require high growth temperatures, which can lead to inconsistencies.
- This study demonstrates a method to grow WSe at a reduced temperature of 800°C using a seeding promoter and low-pressure chemical vapor deposition, resulting in high-quality interfaces with graphene, characterized by transmission electron microscopy (TEM).
The diamagnetic semimetal CoSi presents unanticipated ferromagnetism as CoSi/SiO2 nanowires (NWs). Using first-principles calculations, we offer physical insights into the origins of this unusual magnetism. Due to the distorted and dangling bonds near the NW surface with different bond lengths, the transition metal (Co) d-orbital electron spin up and spin down populations become asymmetric from the exchange interactions, providing the mechanism for some of the measured magnetization.
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