| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Synthesis and Characterization of Q-silicon |
| Author(s) |
Siba Sundar Sahoo, Naveen Joshi, Jagdish Narayan, Roger Narayan |
| On-Site Speaker (Planned) |
Siba Sundar Sahoo |
| Abstract Scope |
We have synthesized a new allotrope of zinc-blende silicon, Q-silicon (Q-Si) by nanosecond laser melting and subsequent quenching of amorphous Silicon. This new phase has higher density (>60%) than crystalline silicon (c-Si) of zinc blende structure and shows robust room temperature ferromagnetism (Tc>400K). Q-Si has capabilities such as development of spin qubit quantum computer and highly stable anode material for Li Batteries with improved power, performance, safety and cyclability. In this work, we use laser-solid interaction simulations coupled with atomistic ab initio modeling to study the conversion methodology of a-Si to Q-Si. We carried out Raman spectroscopy to understand the bonding characteristics of the Q-Si and TEM diffraction studies to show how Q-Si is formed by modifying the diamond cubic structure of c-Si. We also used ultrahigh energy resolution monochromated electron energy-loss spectroscopy (EELS) to detect and visualize the energy states near the Fermi level. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Thin Films and Interfaces, Nanotechnology |