2023-06-23 ノースカロライナ州立大学(NCState)
◆Q-シリコンには強化された硬さや超伝導性などの特性もあります。これにより、スピンベースの量子コンピュータやスピントロニクスとの統合など、新たな機能が付加される可能性があります。この研究はMaterials Research Letters誌に掲載され、米国特許も申請されました。
＜関連情報＞
- https://news.ncsu.edu/2023/06/quantum-computing-could-get-boost-from-discovery-of-q-silicon/
- https://www.tandfonline.com/doi/full/10.1080/21663831.2023.2224396
Qシリコンの合成と新規特性（2023年1月） Synthesis and novel properties of Q-silicon (January 2023)
Jagdish Narayan,Siba Sundar Sahoo,Naveen Joshi & Roger Narayan
Materials Research Letters Published:21 Jun 2023
DOI:https://doi.org/10.1080/21663831.2023.2224396
Abstract
We report the discovery of Q-silicon with an atomic density of 60% higher than crystalline silicon while keeping the bonding characteristics the same as normal silicon. Distinct amorphous phases are created, when one, two, or three tetrahedra are randomly packed, and a crystalline phase of Q-silicon is formed when subunit cells are arranged along <110> directions with alternate holes. Nanosecond laser melting of amorphous silicon in an undercooled state and quenching have created Q-silicon with robust ferromagnetism compared to the diamagnetism of silicon. The blocking temperature of Q-silicon is estimated to be over 400 K, thus opening a new frontier for spin-based computing and atomic-level storage.
The discovery of Q-silicon having robust RT ferromagnetism will open a new frontier in atomic-scale spin-based devices and functional integration with nanoelectronics. Other properties of interest include enhanced hardness and superconductivity.
