New mechanism enables spin-selective transport of charge carriers in WSe2
Researchers at Columbia University and the National High Magnetic Field Laboratory recently reported a new mechanism that enables the spin-selective transport of charge carriers in an atomically thin transition metal dichalcogenide, namely tungsten diselenide (WSe2). Their work could open new possibilities for the development of compact and energy-efficient components for spintronic devices.
“Spin is a fundamental quantum property of electrons, which—in a simplified picture—can be thought of like a tiny internal compass needle pointing either ‘up’ or ‘down,’” said En-Min Shih, first author of the paper. “Spin lies at the heart of magnetism and plays a crucial role in many technologies. For example, in a hard disk drive, information is stored based on whether the magnetization of nanoscale regions points up or down. In this way, you can ‘write’ information by forcing the spins in a certain region to order along a particular direction, but how do you ‘read’ the information?”. One common approach to “reading” the information stored in spintronic devices entails measuring how easily electrical current passes through magnetized regions in a material. This approach relies on the fact that electrical current is carried by moving electrons, which also have spin.
Source: https://www.spintronics-info.com/new-mechanism-enables-spin-selective-transport-charge-carriers-wse2
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