Publications (54)
Anisotropic gapping of topological Weyl rings in the charge-density-wave superconductor InxTaSe2
Yupeng Li, Yi Wu, Chenchao Xu +19
Topological materials and topological phases have recently become a hot topic in condensed matter physics. In this work, we report a topological nodal-line semimetal InxTaSe2, in t…
Dynamically Constrained Motion Planning Networks for Non-Holonomic Robots
Jacob J. Johnson, Linjun Li, Fei Liu +2
Reliable real-time planning for robots is essential in today's rapidly expanding automated ecosystem. In such environments, traditional methods that plan by relaxing constraints be…
Anomalous quantum metal in a 2D crystalline superconductor with intrinsic electronic non-uniformity
Linjun Li, Chuan Chen, Kenji Watanabe +6
The details of the superconducting to quantum metal transition (SQMT) at T=0 are an open problem that invokes much interest in the nature of this exotic and unexpected ground state…
Fast Fabrication of WS2/Bi2Se3 Heterostructures for High Performance Photodetection
Fan Li, Jialin Li, Junsheng Zheng +4
Two-dimensional (2D) material heterostructures have attracted considerable attention owing to their interesting and novel physical properties, which expand the possibilities for fu…
Polynomial bound for the localization length of Lorentz mirror model on the 1D cylinder
Linjun Li
We prove polynomial upper bounds for the localization length of the Lorentz mirror model and the Manhattan model on the even cylinder. We first show that a fixed positive lower bou…
3DRP-Net: 3D Relative Position-aware Network for 3D Visual Grounding
Zehan Wang, Haifeng Huang, Yang Zhao +5
3D visual grounding aims to localize the target object in a 3D point cloud by a free-form language description. Typically, the sentences describing the target object tend to provid…
Active control of excitonic strong coupling and electroluminescence in electrically driven plasmonic nanocavities
Junsheng Zheng, Ruoxue Yang, Alexey V. Krasavin +9
Enhancement and active control of light-matter interactions at the atomic scale is important for developing next-generation nanophotonic and quantum optical devices. Here, we demon…
Shrinking braids and Left distributive monoid
Linjun Li
We consider a natural generalization of braids which we call shrinking braids. We state the relations of shrinking braids and use them to define algebraically the monoid . We en…
Organic metallic epsilon-near-zero materials with large ultrafast optical nonlinearity
Qili Hu, Xinlan Yu, Hongqi Liu +7
Epsilon-near-zero (ENZ) materials have shown significant potential for nonlinear optical applications due to their ultrafast hot carriers and consequent optical nonlinearity enhanc…
MixSpeech: Cross-Modality Self-Learning with Audio-Visual Stream Mixup for Visual Speech Translation and Recognition
Xize Cheng, Linjun Li, Tao Jin +7
Multi-media communications facilitate global interaction among people. However, despite researchers exploring cross-lingual translation techniques such as machine translation and a…
Discrete Unique Continuation on Simplex
Linjun Li
For integers and , let \[ Δ_N^{(n)} =\left\{α\in\mathbb Z_{\ge 0}^n: α_1+\cdots+α_n=N\right\}. \] We formulate a discrete unique-continuation problem on this lattice…
Motion Planning Transformers: A Motion Planning Framework for Mobile Robots
Jacob J. Johnson, Uday S. Kalra, Ankit Bhatia +3
Fast and efficient sampling-based motion planning (SMP) is an integral component of many robotic systems, such as autonomous cars. A popular technique to improve the efficiency of…
Connecting Multi-modal Contrastive Representations
Zehan Wang, Yang Zhao, Xize Cheng +8
Multi-modal Contrastive Representation learning aims to encode different modalities into a semantically aligned shared space. This paradigm shows remarkable generalization ability…
Third order nonlinear transport properties in topological chiral antiferromagnetic semimetal CoNb3S6
Junjian Mi, Jialin Li, Miaocong Li +8
The topology between Bloch states in reciprocal space has attracted tremendous attention in recent years. The quantum geometry of the band structure is composed of quantum metric a…
Distilling Coarse-to-Fine Semantic Matching Knowledge for Weakly Supervised 3D Visual Grounding
Zehan Wang, Haifeng Huang, Yang Zhao +5
3D visual grounding involves finding a target object in a 3D scene that corresponds to a given sentence query. Although many approaches have been proposed and achieved impressive p…
A simplified method characterizing magnetic ordering modulated photo-thermoelectric response in noncentrosymmetric semimetal Ca3Ru2O7
Qiang Chen, Jialin Li, Huanfeng Zhu +6
Photo-Thermoelectric (PTE) response is usually one of the main working mechanisms for photodetectors. However, as another fast and easier way to measure thermoelectric characterist…
Thickness dependent dark exciton emission in (PEA)2PbI4 nanoflake and its brightening by in-plane magnetic field
Wei Tang, Liting Tao, Tian Zhang +3
Halide perovskite materials raised tremendous interest in recent years since their cheap fabrication, superior performance in both solar cell and light emitting diode (LED). Due to…
Anderson-Bernoulli localization at large disorder on the 2D lattice
Linjun Li
We consider the Anderson model at large disorder on where the potential has a symmetric Bernoulli distribution. We prove that Anderson localization happens outside a…
Surface critical exponents at a discontinuous bulk transition
Linjun Li, Michel Pleimling
Systems with a bulk first-order transition can display diverging correlation lengths close to a surface. This surface induced disordering yields a special type of surface criticali…
Three-dimensional Resonance in superconducting BaFeNiAs
Songxue Chi, Astrid Schneidewind, Jun Zhao +8
We use inelastic neutron scattering to study magnetic excitations of the FeAs-based superconductor BaFeNiAs above and below its superconducting transition tempe…
Character Beyond Speech: Leveraging Role-Playing Evaluation in Audio Large Language Models via Reinforcement Learning
Dongjie Fu, Fangming Feng, Xize Cheng +3
The rapid evolution of multimodal large models has revolutionized the simulation of diverse characters in speech dialogue systems, enabling a novel interactive paradigm. Character…
Same Dangerous Objective, Opposite Advice: Direct Exposure versus Multi-Agent Mediation
Linjun Li
Even a current high-capability LLM can appear safer when shown a dangerous objective directly than when other agents transform and relay its direction. Using OpenAI's gpt-5.6-sol m…
Engineering bandgaps of monolayer MoS2 and WS2 on fluoropolymer substrates by electrostatically tuned many-body effects
Bo Liu, Weijie Zhao, Zijing Ding +6
Intrinsic electrical and excitonic properties of monolayer transition metal dichalcogenides are studied on CYTOP fluoropolymer substrates with greatly suppressed unintentional dopi…
Atomically smooth single-crystalline platform for low-loss plasmonic nanocavities
Lufang Liu, Alexey V. Krasavin, Junsheng Zheng +10
Nanoparticle-on-mirror plasmonic nanocavities, capable of extreme optical confinement and enhancement, have triggered state-of-the-art progress in nanophotonics and development of…
Towards Realistic 3D Emission Materials: Dataset, Baseline, and Evaluation for Emission Texture Generation
Zhiyuan Zhang, Zijian Zhou, Linjun Li +3
3D texture generation is receiving increasing attention, as it enables the creation of realistic and aesthetic texture materials for untextured 3D meshes. However, existing 3D text…
Highly tunable lateral homojunction formed in 2D layered CuInP2S6 via in-plane ionic migration
Huanfeng Zhu, Jialin Li, Qiang Chen +4
As basic building blocks for next-generation information technologies devices, high-quality p-n junctions based on van der Waals (vdW) materials have attracted widespread interest.…
Enhancing charge-density-wave order in 1T-TiSe2 nanosheet by encapsulation with hexagonal Boron Nitride
Linjun Li, WeiJie Zhao, Bo Liu +3
Layered transition metal dichalcogenides (TMDs) provide an ideal platform for exploring the effects of dimensionality on correlated electronic phases such as charge density wave (C…
Large-area, freestanding single-crystal gold of single nanometer thickness
Chenxinyu Pan, Yuanbiao Tong, Haoliang Qian +14
Two-dimensional single-crystal metals are highly sought after for next-generation technologies. Here, we report large-area (>10^4 μm2), single-crystal two-dimensional gold with th…
OpenSR: Open-Modality Speech Recognition via Maintaining Multi-Modality Alignment
Xize Cheng, Tao Jin, Linjun Li +3
Speech Recognition builds a bridge between the multimedia streaming (audio-only, visual-only or audio-visual) and the corresponding text transcription. However, when training the s…
Anderson-Bernoulli Localization on the 3D lattice and discrete unique continuation principle
Linjun Li, Lingfu Zhang
We consider the Anderson model with Bernoulli potential on the 3D lattice, and prove localization of eigenfunctions corresponding to eigenvalues near zero, the lower boundary of th…
On Support Cardinality for the Discrete Schrödinger Equation
Linjun Li
How sparse can a nontrivial solution of a discrete Schrödinger equation be? In this note we study Dirichlet solutions on a finite -dimensional lattice box, allowing an arbitrar…
EAGER: Two-Stream Generative Recommender with Behavior-Semantic Collaboration
Ye Wang, Jiahao Xun, Minjie Hong +8
Generative retrieval has recently emerged as a promising approach to sequential recommendation, framing candidate item retrieval as an autoregressive sequence generation problem. H…
Three-dimensional non-equilibrium Potts systems with magnetic friction
Linjun Li, Michel Pleimling
We study the non-equilibrium steady states that emerge when two interacting three-dimensional Potts blocks slide on each other. As at equilibrium the Potts model exhibits different…
High performance artificial visual system with plasmon-enhanced 2D material neural network
Tian Zhang, Xin Guo, Pan Wang +2
Artificial visual systems (AVS) have gained tremendous momentum because of its huge potential in areas such as autonomous vehicles and robotics as part of artificial intelligence (…
Direct-Current Generator Based on Dynamic Water-Semiconductor Junction with Polarized Water as Moving Dielectric Medium
Yanghua Lu, Yanfei Yan, Xutao Yu +8
There is a rising prospective in harvesting energy from water droplets, as microscale energy is required for the distributed sensors in the interconnected human society. However, a…
Spin gap and magnetic resonance in superconducting BaFeNiAs
Shiliang Li, Ying Chen, Sung Chang +6
We use neutron spectroscopy to determine the nature of the magnetic excitations in superconducting BaFeNiAs ( K). Above the excitations are…
Effect of Zn doping on magnetic order and superconductivity in LaFeAsO
Yuke Li, Xiao Lin, Qian Tao +7
We report Zn-doping effect in the parent and F-doped LaFeAsO oxy-arsenides. Slight Zn doping in LaFeZnAsO drastically suppresses the resistivity anomaly around 150 K…
One-step lowest-variance selection in a Gaussian random-field model motivated by masked diffusion: Total correlation and a square root collision threshold
Linjun Li
Motivated by confidence-guided parallel unmasking in masked discrete diffusion, we study a single selection step in a stylized Gaussian random-field model. A locally dependent nonn…
Interfacial Charge Transfer and Ultrafast Photonics Application of 2D Graphene/InSe Heterostructure
Jialin Li, Lizhen Wang, Yuzhong Chen +4
Interface interactions in 2D vertically stacked heterostructures play an important role in optoe-lectronic applications, photodetectors based on graphene/InSe heterostructures had…
MPC-MPNet: Model-Predictive Motion Planning Networks for Fast, Near-Optimal Planning under Kinodynamic Constraints
Linjun Li, Yinglong Miao, Ahmed H. Qureshi +1
Kinodynamic Motion Planning (KMP) is to find a robot motion subject to concurrent kinematics and dynamics constraints. To date, quite a few methods solve KMP problems and those tha…
Evidence of Magnetically Driven Structural Phase Transition in Parent Compounds RFeAsO (R = La, Sm, Gd, Tb): study of low-temperature X-ray diffraction
Yongkang Luo, Qian Tao, Yuke Li +10
We report measurements of structural phase transition of four parent compounds FeAsO ( = La, Sm, Gd, and Tb) by means of low-temperature X-ray diffraction (XRD). Magnetic tra…
Superconductivity in LaFeAsPO: effect of chemical pressures and bond covalency
Cao Wang, Shuai Jiang, Qian Tao +7
We report the realization of superconductivity by an isovalent doping with phosphorus in LaFeAsO. X-ray diffraction shows that, with the partial substitution of P for As, the Fe$_2…
Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
Cao Wang, Linjun Li, Shun Chi +10
Following the discovery of superconductivity in an iron-based arsenide LaO1-xFxFeAs with a superconducting transition temperature (Tc) of 26 K[1], Tc was pushed up surprisingly to…
Superconductivity in tantalum self-intercalated 4-TaSe
Hua Bai, Mengmeng Wang, Xiaohui Yang +6
TaSe has several different polytypes and abundant physical properties such as superconductivity and charge density waves (CDW), which had been investigated in the past few deca…
TransFace: Unit-Based Audio-Visual Speech Synthesizer for Talking Head Translation
Xize Cheng, Rongjie Huang, Linjun Li +7
Direct speech-to-speech translation achieves high-quality results through the introduction of discrete units obtained from self-supervised learning. This approach circumvents delay…
Growth of scale-free networks under heterogeneous control
Linjun Li, Xiangwen Wang
Real-life networks often encounter vertex dysfunctions, which are usually followed by recoveries after appropriate maintenances. In this paper we present our research on a model of…
On the Manhattan pinball problem
Linjun Li
We consider the periodic Manhattan lattice with alternating orientations going north-south and east-west. Place obstructions on vertices independently with probability . A p…
Controlling many-body states by the electric-field effect in a two-dimensional material
Linjun Li, Eoin C. T. O Farrell, Kianping Loh +3
To understand complex physics of a system with strong electron electron interactions, it is ideal to control and monitor its properties while tuning an external electric field appl…
Formation of nonequilibrium modulated phases under local energy input
Linjun Li, Michel Pleimling
We study numerically an inhomogeneous Ising lattice gas with short-range interactions where different sectors are in contact with thermal baths at different temperatures. Inside th…
The Influence of Dimensionality on the Charge Density Wave Transition and Its Application on Mid-infrared Photodetection
Jialin Li, Hua Bai, Yupeng Li +7
Two-dimensional charge density wave (CDW) materials received much attention for high responsivity and broadband photodetection in recent years, due to their collective electron tra…
Highly sensitive photodetector based on two-dimensional ferroelectric semiconducting \{beta}-InSe/graphene heterostructure
Jialin Li, Yuzhong Chen, Yujie Li +2
2D ferroelectric \{beta}-InSe/graphene heterostructure was fabricated by mechanical exfoliation, and the carrier dynamics crossing the heterostructure interface has been systematic…
OmniChat: Enhancing Spoken Dialogue Systems with Scalable Synthetic Data for Diverse Scenarios
Xize Cheng, Dongjie Fu, Xiaoda Yang +11
With the rapid development of large language models, researchers have created increasingly advanced spoken dialogue systems that can naturally converse with humans. However, these…
AV-TranSpeech: Audio-Visual Robust Speech-to-Speech Translation
Rongjie Huang, Huadai Liu, Xize Cheng +8
Direct speech-to-speech translation (S2ST) aims to convert speech from one language into another, and has demonstrated significant progress to date. Despite the recent success, cur…
Meissner-Like Currents of Photons in Anomalous Superradiant Phases
Linjun Li, Pengfei Huang, Zi-Xiang Hu +1
We present Meissner-like photon currents in a quantum Rabi zigzag chain under staggered synthetic magnetic fields. The ground state of the Meissner superradiant phase hosts persist…