Recently, a research team from Beihang University’s School of Integrated Circuit Science and Engineering, led by Professor Zhao Weisheng and Professor Nie Tianxiao, has achieved a notable breakthrough in the field of two-dimensional spintronics. Their findings have been published in the esteemed journal Nature Communications.

The team successfully fabricated high-quality, fully two-dimensional heterostructures of Bi₂Te₃/Fe₃GeTe₂ using molecular beam epitaxy. This enabled them to achieve spin-orbit torque (SOT)-driven magnetization switching at room temperature, with an impressive SOT efficiency of 2.69 and a switching current density of 2.2×10⁶ A/cm².

The topological insulator Bi₂Te₃ played a dual role in this system. It not only increased the Curie temperature of the magnetic layer Fe₃GeTe₂ but also acted as a spin current source. Through interfacial exchange coupling, it facilitated magnetization switching in Fe₃GeTe₂.

This groundbreaking work paves the way for the practical application of fully two-dimensional van der Waals spintronic devices at room temperature. It holds the potential to overcome key challenges in the field, such as “size scaling” limitations and “power consumption walls”. Ultimately, this research could lead to the development of new, high-performance memory devices.