Recently, The research group of Professor Wang Chuankui from the School of Physics and Electronic Science of Shandong Normal University published the title "Realizing sub-6-nm-channel high-performance spin" in the internationally renowned journal Applied Physics Letters "field effect transistors in lateral Sc2CHO/Sc2CHF/Sc2CHO heterojunctions", which was selected as Editor's Pick. Shandong Normal University is the first signatory of the paper. Wang Shaoxian, PhD candidate, is the first author. The corresponding authors are Professor Wang Chuankui and Associate Professor Zhang Guangping.
Spin-field-effect transistors (spin-Fets), which use the Spin of electrons rather than the charge as the information carrier, have the characteristics of low power consumption and high speed, and are considered to be an important candidate for nanoelectronic devices in the post-Moore era. However, due to the low efficiency of magnetic metal injection into semiconductor Spin, spin-FET has been challenged to meet the needs of practical applications. In this study, a transverse heterostructure Spin-FET with ferromagnetic semi-metal Sc₂CHO as the source leakage electrode and non-magnetic semiconductor Sc₂CHF as the channel was constructed by using 2D Sc₂ MXene material and surface functionalization strategy to regulate its electronic structure characteristics. The design effectively optimizes the interface properties of the device, and the spin polarizability of the device is increased to nearly 100% while ensuring the spin transport efficiency.
First-principles calculations show that the devices designed above exhibit extremely low subthreshold swing (as low as 39 mV/dec at ultra-low temperatures and as low as 82 mV/dec at room temperature) and extremely high reluctance ratios (over 109% at ultra-low temperatures and over 106% at room temperature) at ultra-short channels (<6 nm). The results provide an important theoretical reference for the industrial design of the next generation of spintronic devices.
The above research was supported by the National Natural Science Foundation of China.
