Science, Space and Technology News 2024
Researchers have manipulated the ‘electron universe’s’ geometry within a magnetic material, opening pathways for advanced spintronic devices that utilize quantum-driven, non-Ohmic conduction. Credit: SciTechDaily.
The researchers’ breakthrough reveals the fundamental quantum science of electrons and paves the way for designing innovative spintronic devices. Credit: Tohoku UniversityElectric conduction, which is crucial for many devices, follows Ohm’s law: a current responds proportionally to applied voltage. But to realize new devices, scientists have had to find a means to go beyond this law. Here is where quantum mechanics come in.
The research team reported successful manipulation of the quantum-metric structure at room temperature in a thin-film heterostructure comprising an exotic magnet, Mn3Sn, and a heavy metal, Pt. Mn3Sn exhibits essential magnetic texture when adjacent to Pt, which is drastically modulated by an applied magnetic field.
In a Hall bar device of Mn3Sn/Pt under a magnetic field H , the second-order Hall effect is obtained from the experiment and the theoretical modeling based on the quantum metric . Credit: Jiahao Han, Yasufumi Araki, and Shunsuke Fukami
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