Publications (58)
Single crystal synthesis and low-lying electronic structure of VS
Yu-Jie Hao, Ming-Yuan Zhu, Xiao-Ming Ma +17
We report successful growth of millimeter-sized high quality single crystals of VS, a candidate topological semimetal belonging to a low-symmetry space group and consisting…
Linear Moment Models to Approximate Knudsen Layers
Ruo Li, Yichen Yang
We propose a well-posed Maxwell-type boundary condition for the linear moment system in half-space. As a reduction of the Boltzmann equation, the moment equations are available to…
PIAT: Parameter Interpolation based Adversarial Training for Image Classification
Kun He, Xin Liu, Yichen Yang +4
Adversarial training has been demonstrated to be the most effective approach to defend against adversarial attacks. However, existing adversarial training methods show apparent osc…
Flat bands, non-trivial band topology and electronic nematicity in layered kagome-lattice RbTiBi
Zhicheng Jiang, Zhengtai Liu, Haiyang Ma +15
Layered kagome-lattice materials with 3 transition metals provide a fertile playground for studies on geometry frustration, band topology and other novel ordered states. A repre…
Adversarial Training with Fast Gradient Projection Method against Synonym Substitution based Text Attacks
Xiaosen Wang, Yichen Yang, Yihe Deng +1
Adversarial training is the most empirically successful approach in improving the robustness of deep neural networks for image classification.For text classification, however, exis…
Phase-field modeling of elastically driven abnormal grain growth
Yazhuo Liu, Yin Zhang, Kunqing Ding +6
Grain-refined metals typically exhibit high strength, yet their engineering applications are often constrained by grain coarsening under thermo-mechanical loading. Recent experimen…
Dual Diffusion Models for Multi-modal Guided 3D Avatar Generation
Hong Li, Yutang Feng, Minqi Meng +3
Generating high-fidelity 3D avatars from text or image prompts is highly sought after in virtual reality and human-computer interaction. However, existing text-driven methods often…
Observation of multiple surface states in naturally cleavable chiral crystal PdSbSe
Zhicheng Jiang, Zhengtai Liu, Chenqiang Hua +11
Chiral multifold fermions in solids exhibit unique band structures and topological properties, making them ideal for exploring fundamental physical phenomena related to nontrivial…
On the Impact of Player Capability on Congestion Games
Yichen Yang, Kai Jia, Martin Rinard
We study the impact of player capability on social welfare in congestion games. We introduce a new game, the Distance-bounded Network Congestion game (DNC), as the basis of our stu…
Giant domain wall anomalous Hall effect in an antiferromagnet
Wei Xia, Bo Bai, Xuejiao Chen +25
Generally, the dissipationless Hall effect in solids requires time-reversal symmetry breaking (TRSB), where TRSB induced by external magnetic field results in ordinary Hall effect,…
Slip and Jump Coefficients for General Gas-Surface Interactions According to the Moment Method
Ruo Li, Yichen Yang
We develop a moment method based on the Hermite series of arbitrary order to calculate viscous-slip, thermal-slip, and temperature-jump coefficients for general gas-surface scatter…
Observation of possible excitonic charge density waves and metal-insulator transitions in atomically thin semimetals
Qiang Gao, Yang-hao Chan, Pengfei Jiao +9
Charge density wave (CDW) is a collective quantum phenomenon with a charge modulation in solids1-2. Condensation of electron and hole pairs with finite momentum will lead to such a…
Accelerating Graph Analytics on a Reconfigurable Architecture with a Data-Indirect Prefetcher
Yichen Yang, Jingtao Li, Nishil Talati +5
The irregular nature of memory accesses of graph workloads makes their performance poor on modern computing platforms. On manycore reconfigurable architectures (MRAs), in particula…
Low algorithmic delay implementation of convolutional beamformer for online joint source separation and dereverberation
Kaien Mo, Xianrui Wang, Yichen Yang +2
Blind-audio-source-separation (BASS) techniques, particularly those with low latency, play an important role in a wide range of real-time systems, e.g., hearing aids, in-car hand-f…
Spectroscopic signature of obstructed surface states in SrInP
Xiang-Rui Liu, Hanbin Deng, Yuntian Liu +13
The century-long development of surface sciences has witnessed the discoveries of a variety of quantum states. In the recently proposed "obstructed atomic insulators", insulators w…
Dimensionality-controlled evolution of charge-transfer energy in digital nickelates superlattices
Xiangle Lu, Jishan Liu, Nian Zhang +12
Fundamental understanding and control of the electronic structure evolution in rare-earth nickelates is a fascinating and meaningful issue, as well as being helpful to understand t…
Parameter Interpolation Adversarial Training for Robust Image Classification
Xin Liu, Yichen Yang, Kun He +1
Though deep neural networks exhibit superior performance on various tasks, they are still plagued by adversarial examples. Adversarial training has been demonstrated to be the most…
Observation of electronic nematicity driven by three-dimensional charge density wave in kagome lattice KVSb
Zhicheng Jiang, Haiyang Ma, Wei Xia +14
Kagome superconductors AVSb (A = K, Rb, Cs) provide a fertile playground for studying intriguing phenomena, including non-trivial band topology, superconductivity, giant an…
Robust Textual Embedding against Word-level Adversarial Attacks
Yichen Yang, Xiaosen Wang, Kun He
We attribute the vulnerability of natural language processing models to the fact that similar inputs are converted to dissimilar representations in the embedding space, leading to…
Initial performance results of the JUNO detector
Angel Abusleme, Thomas Adam, Kai Adamowicz +1131
The Jiangmen Underground Neutrino Observatory (JUNO) started physics data taking on 26 August 2025. JUNO consists of a 20-kton liquid scintillator central detector, surrounded by a…
Mixed Capability Games
Kai Jia, Martin Rinard, Yichen Yang
We present a new class of strategic games, mixed capability games, as a foundation for studying how different player capabilities impact the dynamics and outcomes of strategic game…
Kagome surface states and weak electronic correlation in vanadium-kagome metals
Jianyang Ding, Ningning Zhao, Zicheng Tao +10
RV6Sn6 (R = Y and lanthanides) with two-dimensional vanadium-kagome surface states is an ideal platform to investigate kagome physics and manipulate the kagome features to realize…
Fast Adversarial Training against Textual Adversarial Attacks
Yichen Yang, Xin Liu, Kun He
Many adversarial defense methods have been proposed to enhance the adversarial robustness of natural language processing models. However, most of them introduce additional pre-set…
Neurosymbolic Transformers for Multi-Agent Communication
Jeevana Priya Inala, Yichen Yang, James Paulos +5
We study the problem of inferring communication structures that can solve cooperative multi-agent planning problems while minimizing the amount of communication. We quantify the am…
Emergence of Quantum Confinement in Topological Kagome Superconductor CsVSb family
Yongqing Cai, Yuan Wang, Zhanyang Hao +19
Quantum confinement is a restriction on the motion of electrons in a material to specific region, resulting in discrete energy levels rather than continuous energy bands. In certai…
Surface reconstruction and orthogonal decoupling in SrAl4 and EuAl4
Tongrui Li, Leiyuan Chen, Jian Yuan +10
Surface-induced symmetry breaking in quantum materials can stabilize exotic electronic phases distinct from those in the bulk, yet its momentum-space manifestations remain elusive…
Measurement of gas properties for the ion-TPC of NDEx experiment
Tianyu Liang, Meiqiang Zhan, Hulin Wang +13
In the NDEx collaboration, a high-pressure gas TPC is being developed to search for the neutrinoless double beta decay. The use of electronegative gas m…
Tunable intrinsic ferromagnetic topological phases in bulk van der Waals crystal MnSb6Te10
Xin Zhang, Shihao Zhang, Zhicheng Jiang +14
Intrinsic ferromagnetism is a crucial ingredient to realize quantum anomalous Hall effect in quasi two dimensional materials, thus the search of intrinsic ferromagnetic topological…
Dynaseal: A Backend-Controlled LLM API Key Distribution Scheme with Constrained Invocation Parameters
Jiahao Zhao, Jiayi Nan, Lai Wei +2
Due to the exceptional performance of Large Language Models (LLMs) in diverse downstream tasks,there has been an exponential growth in edge-device requests to cloud-based models.Ho…
Geometrically Constrained Decentralized Independent Vector Analysis for Distributed Microphone Arrays
Changda Chen, Yichen Yang, Wei Liu +4
This paper proposes a geometrically constrained decentralized independent vector analysis (GC-Dec-IVA) method for distributed microphone arrays. Recently proposed Dec-IVA method en…
Large band-splitting in -wave type altermagnet CrSb
Jianyang Ding, Zhicheng Jiang, Xiuhua Chen +19
Altermagnetism (AM), a newly discovered magnetic state, ingeniously integrates the properties of ferromagnetism and antiferromagnetism, representing a significant breakthrough in t…
Neural Network-Based Time-Frequency-Bin-Wise Linear Combination of Beamformers for Underdetermined Target Source Extraction
Changda Chen, Yichen Yang, Wei Liu +1
Extracting a target source from underdetermined mixtures is challenging for beamforming approaches. Recently proposed time-frequency-bin-wise switching (TFS) and linear combination…
First measurement of reactor neutrino oscillations at JUNO
Angel Abusleme, Thomas Adam, Kai Adamowicz +1131
Neutrino oscillations, a quantum effect manifesting at macroscopic scales, are governed by lepton flavor mixing angles and neutrino mass-squared differences that are fundamental pa…
Direct observation of topological surface states in the layered kagome lattice with broken time-reversal symmetry
Zhicheng Jiang, Tongrui Li, Jian Yuan +14
Magnetic topological quantum materials display a diverse range of fascinating physical properties which arise from their intrinsic magnetism and the breaking of time-reversal symme…
Dirac nodal lines in the quasi-one-dimensional ternary telluride TaPtTe
Shaozhu Xiao, Wen-He Jiao, Yu Lin +9
A Dirac nodal-line phase, as a quantum state of topological materials, usually occur in three-dimensional or at least two-dimensional materials with sufficient symmetry operations…
On Well-posed Boundary Conditions for the Linear Non-homogeneous Moment Equations in Half-space
Ruo Li, Yichen Yang
We propose a necessary and sufficient condition for the well-posedness of the linear non-homogeneous Grad moment equations in half-space. The Grad moment system is based on Hermite…
Development of a simulation and analysis framework for NνDEx experiment
Tianyu Liang, Hulin Wang, Dongliang Zhang +9
NDEx aims to search for the neutrinoless double beta decay in Se using a high pressure SeF gas time projection chamber (TPC). This paper presents a simulation…
Photoemission Evidence of a Novel Charge Order in Kagome Metal FeGe
Zhisheng Zhao, Tongrui Li, Peng Li +16
A charge order has been discovered to emerge deep into the antiferromagnetic phase of the kagome metal FeGe. To study its origin, the evolution of the low-lying electronic structur…
Natural Language Adversarial Defense through Synonym Encoding
Xiaosen Wang, Hao Jin, Yichen Yang +1
In the area of natural language processing, deep learning models are recently known to be vulnerable to various types of adversarial perturbations, but relatively few works are don…
PartDiffuser: Part-wise 3D Mesh Generation via Discrete Diffusion
Yichen Yang, Hong Li, Haodong Zhu +4
Existing autoregressive (AR) methods for generating artist-designed meshes struggle to balance global structural consistency with high-fidelity local details, and are susceptible t…
Directed exfoliating and ordered stacking of transition-metal-dichalcogenides
Yanshuang Li, Xiuhua Xie, Binghui Li +13
Two-dimensional van der Waals crystals arise limitless scope for designing novel combinations of physical properties via controlling the stacking order or twist angle of individual…
Robust Online Overdetermined Independent Vector Analysis Based on Bilinear Decomposition
Kang Chen, Xianrui Wang, Yichen Yang +6
Online blind source separation is essential for both speech communication and human-machine interaction. Among existing approaches, overdetermined independent vector analysis (Over…
Evidence of high-temperature exciton condensation in a two-dimensional semimetal
Qiang Gao, Yang-hao Chan, Yuzhe Wang +10
Electrons and holes can spontaneously form excitons and condense in a semimetal or semiconductor, as predicted decades ago. This type of Bose condensation can happen at much higher…
Regional Adversarial Training for Better Robust Generalization
Chuanbiao Song, Yanbo Fan, Yichen Yang +4
Adversarial training (AT) has been demonstrated as one of the most promising defense methods against various adversarial attacks. To our knowledge, existing AT-based methods usuall…
Orbital-selective band evolution and out-of-plane correlation in the FeGe-family kagome antiferromagnet ScFeGe
Jae Hyuck Lee, Ze Yan, Tongrui Li +10
In strongly correlated materials such as high-temperature superconductors, the relation between charge density wave (CDW) order and magnetism remains an important unresolved proble…
DynaQuant: Dynamic Mixed-Precision Quantization for Learned Image Compression
Youneng Bao, Yulong Cheng, Yiping Liu +4
Prevailing quantization techniques in Learned Image Compression (LIC) typically employ a static, uniform bit-width across all layers, failing to adapt to the highly diverse data di…
Multiple magnetic topological phases in bulk van der Waals crystal MnSb4Te7
Shuchun Huan, Shihao Zhang, Zhicheng Jiang +11
The magnetic van der Waals crystals MnBi2Te4/(Bi2Te3)n have drawn significant attention due to their rich topological properties and the tunability by external magnetic field. Alth…
An Approximate Analytical Solution to Knudsen Layers
Ruo Li, Yichen Yang
We apply moment methods to obtaining an approximate analytical solution to Knudsen layers. Based on the hyperbolic regularized moment system for the Boltzmann equation with the Sha…
Emergence of Locally Suboptimal Behavior in Finitely Repeated Games
Yichen Yang, Martin Rinard
We study the emergence of locally suboptimal behavior in finitely repeated games. Locally suboptimal behavior refers to players play suboptimally in some rounds of the repeated gam…
Emergence of new van Hove singularities in the charge density wave state of a topological kagome metal RbV3Sb5
Soohyun Cho, Haiyang Ma, Wei Xia +11
Quantum materials with layered kagome structures have drawn considerable attention due to their unique lattice geometry, which gives rise to flat bands co-existing with Dirac-like…
NLSTEM: Non-local denoising for enhanced 4D-STEM pattern indexing
Yichen Yang, Olivier Pierron, Josh Kacher +1
4D-STEM-based orientation and phase mapping has enabled rapid microstructure quantification that can be directly combined with standard TEM- and STEM-based imaging modes. Typically…
Type-II Dirac Nodal Lines in double-kagome-layered CsVSb
Yongqing Cai, Jianfeng Wang, Yuan Wang +21
Lorentz-violating type-II Dirac nodal line semimetals (DNLSs), hosting curves of band degeneracy formed by two dispersion branches with the same sign of slope, represent a novel st…
Construction of boundary conditions for Navier-Stokes equations from the moment system
Ruo Li, Yichen Yang, Yizhou Zhou
This work concerns with boundary conditions (BCs) of the linearized moment system for rarefied gases. As the Knudsen number is sufficiently small, we analyze the boundary-layer beh…
Correctness Verification of Neural Networks
Yichen Yang, Martin Rinard
We present a novel framework for specifying and verifying correctness globally for neural networks on perception tasks. Most previous works on neural network verification for perce…
Observation of Spin Splitting in Room-Temperature Metallic Antiferromagnet CrSb
Meng Zeng, Ming-Yuan Zhu, Yu-Peng Zhu +18
Recently, unconventional antiferromagnets that enable the splitting of electronic spins have been theoretically proposed and experimentally realized, where the magnetic sublattices…
Dirac Nodal Lines and Nodal Loops in a Topological Kagome Superconductor CsVSb
Zhanyang Hao, Yongqing Cai, Yixuan Liu +21
The intertwining of charge order, superconductivity and band topology has promoted the AVSb (A=K, Rb, Cs) family of materials to the center of attention in condensed matter…
Accelerated Convolutive Transfer Function-Based Multichannel NMF Using Iterative Source Steering
Xuemai Xie, Xianrui Wang, Liyuan Zhang +2
Among numerous blind source separation (BSS) methods, convolutive transfer function-based multichannel non-negative matrix factorization (CTF-MNMF) has demonstrated strong performa…
Equality Saturation for Tensor Graph Superoptimization
Yichen Yang, Phitchaya Mangpo Phothilimtha, Yisu Remy Wang +3
One of the major optimizations employed in deep learning frameworks is graph rewriting. Production frameworks rely on heuristics to decide if rewrite rules should be applied and in…