Publications (32)
Defining the urban "local" with low dimensional manifolds of human mobility networks
Hezhishi Jiang, Liyan Xu, Tianshu Li +7
Urban science has largely relied on universal models, rendering the heterogeneous and locally specific nature of cities effectively invisible. Here we introduce a topological frame…
JAMIP: an artificial-intelligence aided data-driven infrastructure for computational materials informatics
Xin-Gang Zhao, Kun zhou, Bangyu Xing +13
Materials informatics has emerged as a promisingly new paradigm for accelerating materials discovery and design. It exploits the intelligent power of machine learning methods in ma…
LoopMoE: Unifying Iterative Computation with Mixture-of-Experts for Language Modeling
Wenkai Chen, Tianshu Li, Wenyong Huang +3
Mixture-of-Experts (MoE) and looped architectures scale models along two orthogonal axes, namely parameter capacity and effective depth. However, mainstream looped architectures re…
Atomic short-range order control of GeSn as a new degree of freedom for band engineering
Shang Liu, Yunfan Liang, Nirosh M. Eldose +18
Chemical short-range order (SRO) refers to preference or avoidance between neighboring atomic species, which significantly impacts the properties of advanced alloys. However, quant…
Accurate, transferable, and verifiable machine-learned interatomic potentials for layered materials
Johnathan D. Georgaras, Akash Ramdas, Chung Hsuan Shan +4
Twisted layered van-der-Waals materials often exhibit unique electronic and optical properties absent in their non-twisted counterparts. Unfortunately, predicting such properties i…
Spin-Induced Linear Polarization of Excitonic Emission in Antiferromagnetic van der Waals Crystals
Xingzhi Wang, Jun Cao, Zhengguang Lu +8
Antiferromagnets display enormous potential in spintronics owing to its intrinsic nature, including terahertz resonance, multilevel states, and absence of stray fields. Combining w…
Accelerated Screening of Ternary Chalcogenides for High-Performance Optoelectronic Materials
Chen Shen, Tianshu Li, Yixuan Zhang +7
Chalcogenides, which refer to chalcogen anions, have attracted considerable attention in multiple fields of applications, such as optoelectronics, thermoelectrics, transparent cont…
Metastability and Ostwald Step Rule in the Crystallisation of Diamond and Graphite from Molten Carbon
Davide Donadio, Margaret L. Berrens, Wanyu Zhao +2
The crystallisation of carbon from the melt under extreme conditions is highly relevant to earth and planetary science, materials manufacturing, and nuclear fusion research. The th…
Combining Hyperbolic Quadrature Method of Moments and Discrete-Velocity-Direction Models for Solving BGK-type Equations
Tianshu Li, Yihong Chen, Qian Huang
This paper introduces the discrete-velocity-direction model (DVDM) in conjunction with the hyperbolic quadrature method of moments (HyQMOM) to develop a multidimensional spatial-te…
Spin-state Directed Synthesis of >20 micrometers 2D Layered Transition Metal Hydroxides via Edge-on Condensation
Lu Ping, Gillian E. Minarik, Hongze Gao +4
Layered transition metal hydroxides (LTMHs) with transition metal centers sandwiched between layers of coordinating hydroxide anions have attracted considerable interest for their…
Two-Timescale Transmission Design for Wireless Communication Systems Aided by Active RIS
Zhangjie Peng, Tianshu Li, Cunhua Pan +2
This paper considers an active reconfigurable intelligent surface (RIS)-aided communication system, where an M-antenna base station (BS) transmits data symbols to a single-antenna…
RIS-Aided D2D Communications Relying on Statistical CSI with Imperfect Hardware
Zhangjie Peng, Tianshu Li, Cunhua Pan +2
In this letter, we investigate a reconfigurable intelligent surfaces (RIS)-aided device to device (D2D) communication system over Rician fading channels with imperfect hardware inc…
Shining light on short-range atomic ordering in semiconductors alloys
Anis Attiaoui, Shunda Chen, Joseph C. Woicik +7
The functional properties of semiconductors are typically controlled by tailoring their chemical composition and their state of strain, and by controlling their long-range structur…
Geographic Space as Manifolds
Hezhishi Jiang, Liyan Xu, Tianshu Li +5
The communications and interrelations between different locations on the Earth's surface have far-reaching implications for both social and natural systems. Effective spatial analy…
Cu-In Halide Perovskite solar absorbers
Xin-Gang Zhao, Dongwen Yang, Yuanhui Sun +4
The long-term chemical instability and the presence of toxic Pb in otherwise stellar solar absorber APbX have hindered their large-scale commercialization. Previously explore…
Intrinsic defect properties in halide double perovskites for optoelectronic applications
Tianshu Li, Xingang Zhao, Dongwen Yang +2
Lead-free halide double perovskites with the formula of quaternary AB'B'X have recently attracted intense interest as alternatives to lead-halide-perovskite-base…
Realization of 2D Crystalline Metal Nitrides via Selective Atomic Substitution
Jun Cao, Tianshu Li, Hongze Gao +5
Two-dimensional (2D) transition metal nitrides (TMNs) are new members in the 2D materials family with a wide range of applications. Particularly, highly crystalline and large area…
Pangu Ultra MoE: How to Train Your Big MoE on Ascend NPUs
Yehui Tang, Yichun Yin, Yaoyuan Wang +71
Sparse large language models (LLMs) with Mixture of Experts (MoE) and close to a trillion parameters are dominating the realm of most capable language models. However, the massive…
Mo Atom Rearrangement Drives Layer-Dependent Reactivity in Two-Dimensional MoS2
Zifan Wang, Jiaxuan Wen, Tina Mihm +8
Two-dimensional (2D) materials offer a valuable platform for manipulating and studying chemical reactions at atomic level, owing to the ease of controlling their microscopic struct…
Semiconductor-compatible topological digital alloys
Yunfan Liang, Damien West, Shunda Chen +3
Recently, GeSn alloys have attracted much interest for direct-gap infrared photonics and as potential topological materials which are compatible with the semiconductor industry. Ho…
Microscopic Mechanism and Kinetics of Ice Formation at Complex Interfaces: Zooming in on Kaolinite
Gabriele C. Sosso, Tianshu Li, Davide Donadio +2
Most ice in nature forms thanks to impurities which boost the exceedingly low nucleation rate of pure supercooled water. However, the microscopic details of ice nucleation on these…
Phase-based stimulated emission depletion (pSTED) magnetic particle imaging
Guang Jia, Zhongwei Bian, Tianshu Li +11
Magnetic particle imaging (MPI) is an in vivo method to detect magnetic nanoparticles for cell tracking, vascular imaging, and molecular target imaging without ionizing radiation.…
Local Alloy Order in a Ge1-xSnx/Ge Epitaxial Layer
Agnieszka Anna Corley-Wiciak, Shunda Chen, Omar Concepción +6
The local ordering of atoms in alloys directly has a strong impact on their electronic and optical properties. This is particularly relevant in nonrandom alloys, especially if they…
Stimulated Emission Depletion (STED) Magnetic Particle Imaging
Guang Jia, Zhongwei Bian, Tianshu Li +7
Magnetic particle imaging (MPI) is an in-vivo imaging method to detect magnetic nanoparticles for blood vessel imaging and molecular target imaging. Compared with conventional mole…
Inorganic Crystal Structure Prototype Database based on Unsupervised Learning of Local Atomic Environments
Shulin Luo, Bangyu Xing, Muhammad Faizan +9
Recognition of structure prototypes from tremendous known inorganic crystal structures has been an important subject beneficial for material science research and new materials desi…
Analysis and Optimization for RIS-Aided Multi-Pair Communications Relying on Statistical CSI
Zhangjie Peng, Tianshu Li, Cunhua Pan +3
In this paper, we investigate a reconfigurable intelligent surface (RIS) aided multi-pair communication system, in which multi-pair users exchange information via an RIS. We derive…
Coexistence of two types of short-range order in SiGeSn medium-entropy alloys
Xiaochen Jin, Shunda Chen, Tianshu Li
Short-range chemical order (SRO) has been recently demonstrated to play a decisive role in modulating a wide range of physical properties in medium-entropy alloy (MEA) and high-ent…
Short-range order in GeSn alloy
Boxiao Cao, Shunda Chen, Xiaochen Jin +2
Group IV alloys have been long viewed as homogeneous random solid solutions since they were first perceived as Si-compatible, direct-band-gap semiconductors 30 years ago. Such a pe…
Ice Nucleation on Carbon Surface Supports the Classical Theory for Heterogeneous Nucleation
Raffaela Cabriolu, Tianshu Li
The prevalence of heterogeneous nucleation in nature was explained qualitatively by the classical theory for heterogeneous nucleation established over more than 60 years ago, but t…
New Polymorphs of Two-Dimensional Indium Selenide with Enhanced Electronic Properties
Yuanhui Sun, Yawen Li, Tianshu Li +3
The two-dimensional (2D) semiconductor indium selenide (InSe) has attracted significant interest due its unique electronic band structure, high electron mobility and wide tunabilit…
Heterogeneous ice nucleation controlled by the coupling of surface crystallinity and surface hydrophilicity
Yuanfei Bi, Raffaela Cabriolu, Tianshu Li
The microscopic mechanisms controlling heterogeneous ice nucleation are complex and remain poorly understood. Although good ice nucleators are generally believed to match ice latti…
Anisotropic Short-Range Order Modulates Ferroelectric Switching in Wurtzite ScAlN Alloys
Shunda Chen, Xianchao Dong, Xiaochen Jin +1
Ferroelectric switching in wurtzite alloys is typically understood in terms of composition, strain, defects, and interfaces, while local chemical order is often neglected or treate…