基于非晶态结构筛选硫系相变存储材料的机器学习方法

CN118522374BActive Publication Date: 2026-07-17HUAZHONG UNIV OF SCI & TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2024-05-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing phase change memory (PCM) development solutions rely on manually defined screening criteria, resulting in poor screening efficiency, long cycles, and high costs. Furthermore, they primarily target crystalline phase change materials, limiting the comprehensive description of the structure and properties of PCM materials.

Method used

A machine learning approach based on amorphous structures is employed, using first-principles calculations, molecular dynamics simulations, and machine learning models to construct a dataset, optimize model parameters, and screen chalcogenide phase change storage materials. This process includes modeling, molecular dynamics simulations, feature data extraction, and machine learning model training.

Benefits of technology

It improves the accuracy and efficiency of phase change material screening, shortens the screening cycle of new materials, reduces costs, enables more accurate prediction of material properties and behavior, and improves the description method of phase change materials.

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Abstract

本申请属于半导体材料技术领域,具体公开了一种基于非晶态结构筛选硫系相变存储材料的机器学习方法,包括:基于第一性原理计算方法进行建模,得到非晶体模型;对非晶体模型进行分子动力学模拟,计算在目标时间范围内非晶体模型的局部结构,得到特征数据;采用开源程序包读取非晶材料结构文件,得到材料堆叠率,读取材料的化学式信息,得到电负性差异特征;基于特征数据、材料堆叠率以及电负性差异特征建立用于训练模型的数据集,确定训练集对应的样本标签;基于训练集和样本标签对机器学习模型进行训练,得到训练好的机器学习模型。通过本申请,能够提高相变材料筛选的精确度和效率性。
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