钒氧化物成分的加速发现：一种用于材料设计的WGAN-VAE框架
Accelerated Discovery of Vanadium Oxide Compositions: A WGAN-VAE Framework for Materials Design
AI总结：
本文提出WGAN-VAE逆向设计框架，结合稳定性约束和形成能预测加速发现钒氧化物，生成451种成分并发现新型稳定V2O3相，稳定率约20%，优于现有方法。
摘要：
具有定制电子特性的新型材料的发现对于现代器件技术至关重要，但耗时的经验方法阻碍了进展。我们提出了一种逆向设计框架，将增强的Wasserstein生成对抗网络（WGAN）与专门的变分自编码器（VAE）相结合，以加速稳定钒氧化物（V-O）成分的发现。我们的方法具有以下特点：（1）一个集成了稳定性约束和形成能预测的WGAN，能够直接生成热力学上可行的结构；（2）一个精炼的VAE，在保持化学有效性的同时捕获原子位置和晶格参数。应用该框架，我们生成了451种独特的V-O成分，其中91种在严格的热力学标准下是稳定的，44种是亚稳的。值得注意的是，我们发现了几种新的V2O3构型，其形成能低于Materials Project凸包，揭示了以前未知的稳定相。详细的自旋极化DFT+U计算显示出不同的电子行为，包括有前景的半金属特性。我们的方法在质量和稳定性方面均优于现有方法，在严格标准下表现出约20%的稳定率，而早期基准的稳定率较低。此外，对选定成分进行的声子计算证实了动力学稳定性：0 K时的微小虚频模式可能源于有限尺寸效应或已知的相变，表明这些材料在实际条件下仍保持稳定或亚稳。这些发现使我们的框架成为加速材料发现的强大工具，并突出了用于下一代电子器件的有前景的V-O候选材料。
英文摘要：
The discovery of novel materials with tailored electronic properties is crucial for modern device technologies, but time-consuming empirical methods hamper progress. We present an inverse design framework combining an enhanced Wasserstein Generative Adversarial Network (WGAN) with a specialized Variational Autoencoder (VAE) to accelerate the discovery of stable vanadium oxide (V-O) compositions. Our approach features (1) a WGAN with integrated stability constraints and formation energy predictions, enabling direct generation of thermodynamically feasible structures, and (2) a refined VAE capturing atomic positions and lattice parameters while maintaining chemical validity. Applying this framework, we generated 451 unique V-O compositions, with 91 stable and 44 metastable under rigorous thermodynamic criteria. Notably, we uncovered several novel V2O3 configurations with formation energies below the Materials Project convex hull, revealing previously unknown stable phases. Detailed spin-polarized DFT+U calculations showed distinct electronic behaviors, including promising half-metallic characteristics. Our approach outperforms existing methods in both quality and stability, demonstrating about a 20 percent stability rate under strict criteria compared to earlier benchmarks. Additionally, phonon calculations performed on selected compositions confirm dynamic stability: minor imaginary modes at 0 K likely stem from finite-size effects or known phase transitions, suggesting that these materials remain stable or metastable in practical conditions. These findings establish our framework as a powerful tool for accelerated materials discovery and highlight promising V-O candidates for next-generation electronic devices.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
