在量子材料发现的生成模型中整合结构约束
Ryotaro Okabe1,2, Mouyang Cheng3,4,5, Abhijatmedhi Chotrattanapituk3,6
1Quantum Measurement Group, Massachusetts Institute of Technology, Cambridge, MA, USA. rokabe@mit.edu.
Nature materials
|September 22, 2025
概括
一个新的生成模型,SCIGEN,通过强制执行几何约束来创建新的无机材料. 这一框架加速了发现具有所需格子结构的稳定量子材料的过程.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
- 量子物理学 量子物理学 是一种量子物理学.
背景情况:
- 通过计算生成功能性无机材料由于数据稀缺性和结构复杂性而具有挑战性.
- 现有的生成模型很难将新材料的特定结构要求纳入其中.
研究的目的:
- 引入一个新的生成框架,SCIGEN,用于发现稳定的量子材料候选者.
- 为目标材料设计在生成模型中强制执行几何约束.
- 为了加速发现具有特定格子结构的无机材料.
主要方法:
- 开发了SCIGEN (结构约束集成在一个生成模型),一种基于扩散的生成模型,包含几何约束.
- 应用了SCIGEN以产生使用阿基米德和利布格子的无机化合物.
- 利用多阶段稳定性选和高通量密度函数理论 (DFT) 计算.
- 使用图形神经网络分类器来预测磁性排序.
主要成果:
- 产生了1000万种具有特定格子几何形状的无机化合物.
- 超过10%的生成化合物通过了初始稳定性选.
- 对于26,000名候选人,DFT的计算证实了高收率 (95%) 和53%的结构稳定性.
- 在41%的放松结构中确定了磁性排序.
- 成功合成和表征了两个预测的材料,TiPd0.22Bi0.88和Ti0.5Pd1.5Sb.
结论:
- SCIGEN提供了一种可扩展和有效的方法,用于通过格子几何指导生成量子材料.
- 该框架成功地将结构约束整合到生成模型中,克服了以前方法的局限性.
- 这项研究表明,在计算材料发现方面取得了重大进展,为新功能材料铺平了道路.
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