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Leveraging transfer learning for accurate estimation of ionic migration barriers in solids 利用迁移学习来准确估计固体中的离子迁移障碍
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-02-02 DOI: 10.1038/s41524-026-01972-8
Reshma Devi, Keith T. Butler, Gopalakrishnan Sai Gautam
Rate performance of several applications, such as batteries, fuel cells, and electrochemical sensors, is exponentially dependent on the ionic migration barrier (Em) within solids, a difficult-to-estimate quantity. Previous approaches to identify materials with low Em have often relied on imprecise descriptors or rules-of-thumb. Here, we present a graph-neural-network-based architecture that leverages principles of transfer learning to efficiently and accurately predict Em across a variety of materials. We use a model (labeled MPT) that has been simultaneously pre-trained on seven bulk properties, introduce architectural modifications to build inductive bias on different migration pathways in a structure, and subsequently fine-tune (FT) on a manually-curated, literature-derived, first-principles computational dataset of 619 Em values. Importantly, our best-performing FT model (labeled MODEL-3, based on test set scores) demonstrates substantially better accuracy compared to classical machine learning methods, graph models trained from scratch, and a universal machine learned interatomic potential, with a R2 score and a mean absolute error of 0.703 ± 0.109 and 0.261 ± 0.034 eV, respectively, on the test set and is able to classify ‘good’ ionic conductors with an 80% accuracy. Thus, our work demonstrates the effective use of FT strategies and MPT architectural modifications to predict Em, and can be extended to make predictions on other data-scarce material properties.
电池、燃料电池和电化学传感器等几种应用的速率性能指数依赖于固体内的离子迁移势垒(Em),这是一个难以估计的量。以前识别低电磁材料的方法往往依赖于不精确的描述符或经验法则。在这里,我们提出了一个基于图神经网络的架构,该架构利用迁移学习的原理来有效和准确地预测各种材料的Em。我们使用了一个模型(标记为MPT),该模型已经同时在七个体属性上进行了预训练,引入了架构修改,以在结构中的不同迁移路径上建立归纳偏置,并随后在人工整理的、文献推导的、包含619个Em值的第一流原理计算数据集上进行了微调(FT)。重要的是,我们表现最好的FT模型(标记为model -3,基于测试集分数)与经典机器学习方法、从头开始训练的图模型和通用机器学习的原子间势相比,显示出更高的准确性,在测试集上的R2分数和平均绝对误差分别为0.703±0.109和0.261±0.034 eV,并且能够以80%的准确率对“良好”离子导体进行分类。因此,我们的工作证明了FT策略和MPT架构修改的有效使用来预测Em,并且可以扩展到对其他数据稀缺的材料属性进行预测。
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引用次数: 0
Multi-scale modeling GPAl-Li zones in Al-Li alloys starting from first-principles 从第一性原理出发的铝锂合金GPAl-Li区多尺度建模
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-31 DOI: 10.1038/s41524-026-01974-6
Qingkun Tian, Longgang Hou, Junmei Wang, Flemming J. H. Ehlers, Hui Su, Yawen Wang, Yuhong Zhao, Linzhong Zhuang
Age-hardenable Al–Li alloys are critical lightweight structural materials, offering high specific strength. However, the early-stage decomposition of supersaturated solid solution, specifically formation of Guinier-Preston (GPAl-Li) zones during aging, remains a key gap in understanding precipitation sequence. Using density functional theory and cluster expansion method, we determined effective cluster interactions for Al–Li alloys in an fcc lattice and computed Gibbs free energy via meta-dynamics Monte Carlo simulations. A metastable phase diagram encompassing ({{rm{alpha }}}_{{rm{Al}}}), GPAl-Li, and ({{rm{delta }}}^{{prime} }) phases was constructed across relevant temperatures. GPAl–Li zones was revealed to possess a well-ordered structure, further supported by electronic structure analysis. Kinetic phase-field simulations of early-stage decomposition revealed that within appropriate Li concentration ranges, GPAl-Li zones form rapidly and extensively below 483 K, later transforming into ({{rm{delta }}}^{{prime} }) precipitates. These GPAl–Li zones should be directly discernable in cryogenic treated Al–Li alloys, owing to their deeper free energy well and sufficiently slow transformation. We propose that even outside this composition range, GPAl–Li zones may form transiently on the path towards ({{rm{delta }}}^{{prime} }), justifying their inclusion in precipitation sequence. Factors promoting T1 phase nucleation via GPAl–Li zones in Al–Li–Cu alloys were also explored, providing theoretical insights for advanced alloy design.
时效硬化铝锂合金是一种重要的轻质结构材料,具有很高的比强度。然而,过饱和固溶体的早期分解,特别是老化过程中Guinier-Preston (GPAl-Li)带的形成,仍然是理解沉淀序列的关键空白。利用密度泛函理论和团簇展开方法,确定了Al-Li合金在fcc晶格中的有效团簇相互作用,并通过元动力学蒙特卡罗模拟计算了吉布斯自由能。构建了包含({{rm{alpha }}}_{{rm{Al}}})、GPAl-Li和({{rm{delta }}}^{{prime} })相的亚稳相图。GPAl-Li带具有良好的有序结构,并得到电子结构分析的进一步支持。早期分解动力学相场模拟表明,在适当的Li浓度范围内,GPAl-Li带在483 K以下迅速广泛形成,随后转化为({{rm{delta }}}^{{prime} })相。这些GPAl-Li区在低温处理的Al-Li合金中应该是直接可见的,因为它们的自由能阱更深,转变速度足够慢。我们提出,即使在这个组成范围之外,GPAl-Li带也可能在朝向({{rm{delta }}}^{{prime} })的路径上短暂形成,证明它们包含在降水序列中是合理的。研究了Al-Li-Cu合金中通过GPAl-Li带促进T1相成核的因素,为先进的合金设计提供了理论见解。
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引用次数: 0
Probing multi-dimensional composition spaces in search of strong metallic alloys 探测多维成分空间以寻找强金属合金
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-31 DOI: 10.1038/s41524-026-01975-5
Xinran Zhou, Jaime Marian, Fei Zhou, Vasily V. Bulatov
Refractory complex concentrated alloys (RCCA) offer exceptionally high-temperature strength compared to pure metals and dilute alloys, but predictive theory for RCCA design is lacking. We present large-scale molecular Dynamics (MD) simulations of crystal plasticity to explore alloy compositions for maximum mechanical strength, focusing on Fe-Ta-W and Nb-Ta-Mo-W alloy families modeled with Embedded Atom Model (EAM) and Spectral Neighbor Analysis Potentials (SNAP). To efficiently guide the search for strong alloy compositions, we employ iterative optimization using Gaussian process regression. Many simulated RCCA compositions exhibit pronounced cocktail strengthening, with strengths surpassing their strongest constituent metal, tungsten. Contrary to expectations, the highest strength is found on binary edges of the RCCA composition space. Detailed analyses of atomistic simulations reveal that, similar to pure BCC metals, plastic response in RCCA is primarily governed by screw dislocations. However, at large strains, dislocation multiplication and interactions (Taylor hardening) become the dominant mechanisms contributing to RCCA strength.
与纯金属和稀合金相比,难熔复合浓缩合金(RCCA)具有异常高的高温强度,但目前缺乏预测理论。我们提出了大规模分子动力学(MD)模拟晶体塑性,以探索合金成分的最大机械强度,重点是Fe-Ta-W和Nb-Ta-Mo-W合金族,采用嵌入式原子模型(EAM)和光谱邻居分析势(SNAP)建模。为了有效地指导强合金成分的搜索,我们使用高斯过程回归进行迭代优化。许多模拟RCCA组合物表现出明显的鸡尾酒强化,其强度超过其最强的组成金属钨。与预期相反,在RCCA组合空间的二元边缘上发现了最高的强度。原子模拟的详细分析表明,与纯BCC金属类似,RCCA中的塑性响应主要由螺位错控制。然而,在大应变下,位错倍增和相互作用(泰勒硬化)成为促进RCCA强度的主要机制。
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引用次数: 0
Data-driven discovery of methane hydrate promoters 数据驱动的甲烷水合物促进剂的发现
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-29 DOI: 10.1038/s41524-026-01978-2
Yusung Ok, Youngjune Park
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引用次数: 0
Publisher Correction: Deep learning accelerated quantum transport simulations in nanoelectronics: from break junctions to field-effect transistors 深度学习加速纳米电子学中的量子输运模拟:从断结到场效应晶体管
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-28 DOI: 10.1038/s41524-026-01969-3
Jijie Zou, Zhanghao Zhouyin, Dongying Lin, Yike Huang, Linfeng Zhang, Shimin Hou, Qiangqiang Gu
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引用次数: 0
Accelerated discovery of supertetragonal perovskites with giant polarization via machine learning 通过机器学习加速发现具有巨大极化的超四方钙钛矿
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-28 DOI: 10.1038/s41524-026-01970-w
Wenguang Hu, Zebin Wu, Menglu Li, Shan Feng, Hangbo Qi, Xingjian Lu, Xiaotao Zu, Haiyan Xiao, Liang Qiao
Ferroelectric perovskites with giant spontaneous polarization have extensive applications in electronic devices, energy conversion, sensor and so on. However, the rapid discovery of new perovskites with giant polarization remains an open challenge especially when thousands of candidates are treated. Here, combining machine learning (ML) and first-principles calculations, we successfully predict 8 perovskites with giant polarization from 2021 different possible compounds, among which seven candidates have never been reported before. These perovskites have large c/a ratio and giant polarization compared to the reported ferroelectric perovskites, and room temperature stability. Among them, the polarization of SnFeO3 with G-AFM magnetic ordering is as high as 138.63 µC/cm2. The non-magnetic SrPbO3 and magnetic EuSnO3 not only exhibit giant polarization, but also possess band gaps close to the ideal value for photovoltaic applications, showing great potential in the field of ferroelectric photovoltaics. Besides, polarity and metallicity coexist in SnFeO3 and CaTaO3, which are suggested to have potential applications in fields such as spintronics and superconductivity. This work thus provides an effective strategy for discovering new functional materials.
具有巨大自发极化特性的铁电性钙钛矿在电子器件、能量转换、传感器等领域有着广泛的应用。然而,快速发现具有巨大极化的新钙钛矿仍然是一个公开的挑战,特别是当数千个候选矿被处理时。在这里,结合机器学习(ML)和第一线原理计算,我们成功地从2021种不同的可能化合物中预测了8种具有巨大极化的钙钛矿,其中7种候选化合物以前从未报道过。与已有报道的铁电钙钛矿相比,这些钙钛矿具有较大的c/a比和巨大的极化,并且具有室温稳定性。其中,具有G-AFM磁有序的SnFeO3极化率高达138.63µC/cm2。非磁性SrPbO3和磁性EuSnO3不仅具有巨大的极化,而且具有接近光伏应用理想值的带隙,在铁电光伏领域显示出巨大的潜力。此外,SnFeO3和CaTaO3具有极性和金属丰度并存的特性,在自旋电子学和超导等领域具有潜在的应用前景。因此,这项工作为发现新的功能材料提供了有效的策略。
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引用次数: 0
Developing a complete AI-accelerated workflow for superconductor discovery 为超导体的发现开发一个完整的人工智能加速工作流程
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-27 DOI: 10.1038/s41524-026-01964-8
Jason B. Gibson, Ajinkya C. Hire, Pawan Prakash, Philip M. Dee, Benjamin Geisler, Jung Soo Kim, Zhongwei Li, James J. Hamlin, Gregory R. Stewart, P. J. Hirschfeld, Richard G. Hennig
The quest to identify new superconducting materials with enhanced properties is hindered by the prohibitive cost of computing electron-phonon spectral functions, severely limiting the materials space that can be explored. Here, we introduce a Bootstrapped Ensemble of Equivariant Graph Neural Networks (BEE-NET), a machine-learning model trained to predict the Eliashberg spectral function and superconducting critical temperature with a mean-absolute-error of 0.87 K relative to DFT-based Allen-Dynes calculations. Intriguingly, BEE-NET achieves a true-negative-rate of 99.4%, enabling highly efficient screening for the rare property of superconductivity. Integrated into a multi-stage, AI-accelerated discovery pipeline that incorporates elemental-substitution strategies and machine-learned interatomic potentials, our workflow reduced over 1.3 million candidate structures to 741 dynamically and thermodynamically stable compounds with DFT-confirmed Tc > 5 K. We report the successful synthesis and experimental confirmation of superconductivity in two of these previously unreported compounds. This study establishes a data-driven framework that integrates machine learning, quantum calculations, and experiments to systematically accelerate superconductor discovery.
寻找具有增强性能的新型超导材料的努力受到计算电子-声子谱函数的高昂成本的阻碍,严重限制了可以探索的材料空间。在这里,我们引入了一个bootstrap Ensemble of Equivariant Graph Neural Networks (BEE-NET),这是一个机器学习模型,用于预测Eliashberg谱函数和超导临界温度,相对于基于dft的Allen-Dynes计算,平均绝对误差为0.87 K。有趣的是,BEE-NET的真阴性率达到99.4%,能够高效筛选罕见的超导性。集成到一个多阶段,人工智能加速发现管道,结合元素替代策略和机器学习的原子间势,我们的工作流程减少了超过130万个候选结构到741个动态和热力学稳定的化合物,dft确认Tc > 5 K。我们报道了这两种以前未报道过的化合物的成功合成和超导性的实验证实。本研究建立了一个数据驱动的框架,集成了机器学习、量子计算和实验,以系统地加速超导体的发现。
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引用次数: 0
Origin of the machine learning forces field errors across metal elements 机器学习力在金属元素上的场误差的起源
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-27 DOI: 10.1038/s41524-026-01977-3
Xingze Geng, Wentao Zhang, Lin-Wang Wang, Xiangying Meng
The overall development of the machine learning force field (MLFF) has advanced rapidly, with a wide range of models emerging in recent years. However, some fundamental questions remain underexplored, such as why certain systems are intrinsically more difficult to train than others. Understanding this question can help us to propose different models and prepare appropriate datasets for different situations. We constructed Metal-43, a high-quality dataset comprising elemental structures of 43 metallic elements. Through systematic analysis, we reveal regular trends of fitting accuracies of these elemental metals in the periodic table. Unlike previous approaches that generally attribute fitting challenges to a vague notion of a “complex potential energy surface (PES)”, which is almost a synonym of the fitting difficulty, we provide a physical picture which connects the Fermi surface complexity to this complexity of PES. Furthermore, we demonstrate that current MLFF models still face clear limitations in capturing the complex PES even for elemental materials. These findings can provide a theoretical foundation and directional guidance for the development of more general and accurate MLFF models in the future.
机器学习力场(MLFF)的整体发展迅速,近年来出现了各种各样的模型。然而,一些基本问题仍未得到充分探讨,例如为什么某些系统本质上比其他系统更难训练。理解这个问题可以帮助我们提出不同的模型,并为不同的情况准备适当的数据集。我们构建了包含43种金属元素元素结构的高质量数据集Metal-43。通过系统分析,揭示了元素周期表中这些元素的拟合精度的规律趋势。以前的方法通常将拟合挑战归因于一个模糊的概念“复杂势能面(PES)”,这几乎是拟合困难的同义词,而我们提供了一个将费米曲面复杂性与PES复杂性联系起来的物理图像。此外,我们证明了当前的MLFF模型在捕获复杂的PES方面仍然面临明显的局限性,即使对于元素材料也是如此。这些发现可以为今后开发更通用、更准确的MLFF模型提供理论基础和方向性指导。
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引用次数: 0
Colossal magnetoresistance and unusual resistivity behaviors in magnetic semiconductors: Mn3Si2Te6 as a case study 磁性半导体中的巨大磁阻和异常电阻率行为:以Mn3Si2Te6为例研究
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-27 DOI: 10.1038/s41524-026-01963-9
Zhihao Liu, Zhong Fang, Hongming Weng, Quansheng Wu
Colossal magnetoresistance (CMR) is typically observed in manganites and magnetic semiconductors, marked by a resistivity peak near the magnetic transition temperature that is significantly suppressed by an applied magnetic field, commonly referred to as peak-type CMR. This type of CMR has attracted extensive research efforts over the past decades. However, in some materials such as Mn3Si2Te6, both peak-type and upturn-type CMR coexist—the latter characterized by a sharp resistivity upturn at low temperatures that is also strongly suppressed by an external field. Research on the coexistence of these two types of CMR remains relatively unexplored. In our work, we propose a theoretical framework to unravel the mechanisms underlying the above mentioned CMR phenomenon in magnetic semiconductors, and apply it to the ferrimagnetic semiconductor Mn3Si2Te6. The experimentally observed ρ(B, T) behaviors are accurately reproduced, including the upturn-type CMR, peak-type CMR, and movement of Tc (or resistivity peak) with fields. Additionally, the suppression of Tc and resistivity with increasing direct currents, possibly associated with current control of the chiral orbital current (COC) state in the previous work, can also be reproduced within our framework by properly accounting for the Joule heating effects. Our work provides a new perspective for quantitatively calculating and analyzing the unusual resistivity responses to temperature, field, and current in magnetic semiconductors.
巨磁阻(CMR)通常在锰矿石和磁性半导体中观察到,其特征是在磁转变温度附近的电阻率峰值,该峰值被外加磁场显著抑制,通常称为峰型CMR。在过去的几十年里,这种类型的CMR吸引了广泛的研究努力。然而,在一些材料中,如Mn3Si2Te6,峰值型和上升型CMR同时存在,后者的特征是在低温下电阻率急剧上升,也被外场强烈抑制。关于这两种CMR共存的研究相对较少。在我们的工作中,我们提出了一个理论框架来揭示磁性半导体中上述CMR现象的机制,并将其应用于铁磁半导体Mn3Si2Te6。实验观察到的ρ(B, T)行为精确再现,包括上升型CMR,峰型CMR和Tc(或电阻率峰)随场的移动。此外,随着直流电的增加,Tc和电阻率的抑制,可能与先前工作中手性轨道电流(COC)状态的电流控制有关,也可以在我们的框架内通过适当地考虑焦耳加热效应来重现。我们的工作为定量计算和分析磁性半导体中异常电阻率对温度、场和电流的响应提供了新的视角。
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引用次数: 0
Self-optimizing machine learning potential assisted automated workflow for highly efficient complex systems material design 自优化机器学习潜力辅助高效复杂系统材料设计的自动化工作流程
IF 9.7 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Pub Date : 2026-01-26 DOI: 10.1038/s41524-026-01971-9
Jiaxiang Li, Junwei Feng, Jie Luo, Bowen Jiang, Xiangyu Zheng, Qigang Song, Jian Lv, Keith Butler, Hanyu Liu, Congwei Xie, Yu Xie, Yanming Ma
Machine learning interatomic potentials have revolutionized complex materials design by enabling rapid exploration of material configurational spaces via crystal structure prediction with ab initio accuracy. However, critical challenges persist in ensuring robust generalization to unknown structures and minimizing the requirement for substantial expert knowledge and time-consuming manual interventions. Here, we propose an automated crystal structure prediction framework built upon the attention-coupled neural network potential to address these limitations. The generalizability of the potential is achieved by sampling regions across the local minima of the potential energy surface, where the self-evolving pipeline autonomously refines the potential iteratively while minimizing human intervention. The workflow is validated on Mg-Ca-H ternary and Be-P-N-O quaternary systems by exploring nearly 10 million configurations, demonstrating substantial speedup compared to first-principles calculations. These results underscore the effectiveness of our approach in accelerating the exploration and discovery of complex multi-component functional materials.
机器学习原子间势通过从头算精度的晶体结构预测实现材料构型空间的快速探索,从而彻底改变了复杂材料的设计。然而,关键的挑战仍然存在于确保对未知结构的鲁棒泛化,并最大限度地减少对大量专家知识和耗时的人工干预的需求。在这里,我们提出了一个基于注意力耦合神经网络电位的自动晶体结构预测框架来解决这些限制。势能的可泛化性是通过对势能面局部极小值的采样区域来实现的,其中自进化的管道在最小化人为干预的同时自主迭代地改进了势能。该工作流程在Mg-Ca-H三元体系和Be-P-N-O四元体系中进行了验证,探索了近1000万种构型,与第一性原理计算相比,证明了显著的加速。这些结果强调了我们的方法在加速探索和发现复杂的多组分功能材料方面的有效性。
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引用次数: 0
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npj Computational Materials
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