Publications (80)
High Precision, Low Excitation Capactiance Measurement Methods from 10 mK- to Room-Temperature
Lili Zhao, Wenlu Lin, Xing Fan +3
Capacitance measurement is a useful technique in studying quantum devices, as it directly probes the local particle charging properties, i.e. the system compressibility. Here we re…
Observation of superconductivity in 3D Dirac semimetal Cd3As2 crystal
He Wang, Huichao Wang, Haiwen Liu +7
Lately, the three-dimensional (3D) Dirac semimetal, which possesses 3D linear dispersion in electronic structure as a bulk analogue of graphene, has generated widespread interests…
Compositional Coding Capsule Network with K-Means Routing for Text Classification
Hao Ren, Hong Lu
Text classification is a challenging problem which aims to identify the category of texts. In the process of training, word embeddings occupy a large part of parameters. Under the…
Gate Tunable Magneto-resistance of Ultra-Thin WTe2 Devices
Xin Liu, Zhiran Zhang, Chaoyi Cai +8
In this work, the magneto-resistance (MR) of ultra-thin WTe2/BN heterostructures far away from electron-hole equilibrium is measured. The change of MR of such devices is found to b…
Large magnetoresistance observed in α-Sn/InSb heterostructures
Yuanfeng Ding, Huanhuan Song, Junwei Huang +7
In this study, we report the epitaxial growth of a series of α-Sn films on InSb substrate by molecular beam epitaxy (MBE) with thickness varying from 10 nm to 400 nm. High qualiti…
ACNet: Approaching-and-Centralizing Network for Zero-Shot Sketch-Based Image Retrieval
Hao Ren, Ziqiang Zheng, Yang Wu +4
The huge domain gap between sketches and photos and the highly abstract sketch representations pose challenges for sketch-based image retrieval (\underline{SBIR}). The zero-shot sk…
Extending Test-Time Scaling: A 3D Perspective with Context, Batch, and Turn
Chao Yu, Qixin Tan, Jiaxuan Gao +7
Reasoning reinforcement learning (RL) has recently revealed a new scaling effect: test-time scaling. Thinking models such as R1 and o1 improve their reasoning accuracy at test time…
ICPL: Few-shot In-context Preference Learning via LLMs
Chao Yu, Qixin Tan, Hong Lu +5
Preference-based reinforcement learning is an effective way to handle tasks where rewards are hard to specify but can be exceedingly inefficient as preference learning is often tab…
Designing wake-up free ferroelectric capacitors based on the superlattice structure
Na Bai, Kan-Hao Xue, Jinhai Huang +8
The wake-up phenomenon widely exists in hafnia-based ferroelectric capacitors, which causes device parameter variation over time. Crystallization at higher temperatures have been r…
High-temperature Phonon Coherence and Tunneling Effect in Semiconductor Superlattices
Zhi-Ming Geng, Jin-Shan Yao, Ying-Bin Cheng +10
Phonons, the quanta of lattice vibrations, are primary heat carriers for semiconductors and dielectrics. The demand of effective phonon manipulation urgently emerges, because the t…
Phonon Localization in Heat Conduction
Maria N. Luckyanova, Jonathan Mendoza, Hong Lu +9
Departures in phonon heat conduction from diffusion have been extensively observed in nanostructures through their thermal conductivity reduction and largely explained with classic…
General Compression Framework for Efficient Transformer Object Tracking
Lingyi Hong, Jinglun Li, Xinyu Zhou +10
Previous works have attempted to improve tracking efficiency through lightweight architecture design or knowledge distillation from teacher models to compact student trackers. Howe…
Insight-HXMT and GECAM-C observations of the brightest-of-all-time GRB 221009A
Zheng-Hua An, S. Antier, Xing-Zi Bi +174
GRB 221009A is the brightest gamma-ray burst ever detected since the discovery of this kind of energetic explosions. However, an accurate measurement of the prompt emission propert…
The In-Flight Realtime Trigger and Localization Software of GECAM
Xiao-Yun Zhao, Shao-Lin Xiong, Xiang-Yang Wen +86
Realtime trigger and localization of bursts are the key functions of GECAM, which is an all-sky gamma-ray monitor launched in Dec 10, 2020. We developed a multifunctional trigger a…
Supersymmetric Solutions in Four-Dimensional Off-Shell Curvature-Squared Supergravity
Hai-Shan Liu, Hong Lu, Yi Pang +1
Off-shell formulations of supergravities allow one to add closed-form higher-derivative super-invariants that are separately supersymmetric to the usual lower-derivative actions. I…
Magnetic tunneling induced Weyl node annihilation in TaP
Cheng-Long Zhang, Su-Yang Xu, C. M. Wang +20
Weyl nodes are topological objects in three-dimensional metals. Their topological property can be revealed by studying the high-field transport properties of a Weyl semimetal. Whil…
Study on 2015 June 22 Forbush decrease with the muon telescope in Antarctic
De-Hong Huang, Hong-Qiao Hu, Ji-Long Zhang +4
By the end of 2014, a cosmic ray muon telescope was installed at Zhongshan Station in Antarctic and has been continuously collecting data since then. It is the first surface muon t…
Large Magnetoresistance in Compensated Semimetals TaAs and NbAs
Zhujun Yuan, Hong Lu, Yongjie Liu +2
We report large magnetoresistance (MR) at low temperatures in single-crystalline nonmagnetic compounds TaAs and NbAs. Both compounds exhibit parabolic-field-dependent MR la…
Self-assembled ErSb nanostructures of tunable shape and orientation: growth and plasmonic properties
Hong Lu, Daniel G. Ouellette, Sascha Preu +5
Self-assembled, semimetallic ErSb single crystal nanostructures, grown by molecular beam epitaxy, are embedded within a semiconductor GaSb matrix. Formation, evolution and orientat…
Discovery of Lorentz-violating Weyl fermion semimetal state in LaAlGe materials
Su-Yang Xu, Nasser Alidoust, Guoqing Chang +18
We report theoretical and experimental discovery of Lorentz-violating Weyl fermion semimetal type-II state in the LaAlGe class of materials. Previously type-II Weyl state was predi…
Thermal Stability Enhancement in Epitaxial α-Sn Films by Strain Engineering
Huanhuan Song, Jinshan Yao, Yuanfeng Ding +5
Exploring new topological materials with large topological nontrivial bandgaps and simple composition is attractive for both theoretical investigation and experimental realization.…
Topological Weyl phase transition in MoWTe
Ilya Belopolski, Daniel S. Sanchez, Yukiaki Ishida +21
Topological phases of matter exhibit phase transitions between distinct topological classes. These phase transitions are exotic in that they do not fall within the traditional Ginz…
Common dependence on earthquake magnitudes for the trapped particles bursts approaching the earthquake
Ping Wang, Huanyu Wang, Hong Lu +12
Trapped particles bursts have long been observed to be frequently occurred several hours before earthquakes, especially for strong earthquakes, from several space experiments durin…
Topological Phase Transition in Single Crystals of
Hong Lu, Xiao Zhang, Shuang Jia
Single crystals of were synthesized from high-temperature solutions and characterized in terms of their structural and electrical properties. Based on the…
Spin polarization and texture of the Fermi arcs in the Weyl Fermion semimetal TaAs
Su-Yang Xu, Ilya Belopolski, Daniel S. Sanchez +25
A Weyl semimetal is a new state of matter that host Weyl fermions as quasiparticle excitations. The Weyl fermions at zero energy correspond to points of bulk band degeneracy, Weyl…
Optically-Controlled Nano-Transducers Based on Cleaved Superlattices for Monitoring Gigahertz Surface Acoustic Vibrations
Changxiu Li, Nikolay Chigarev, Théo Thréard +6
Surface acoustic waves (SAWs) convey energy at subwavelength depths along surfaces. Using interdigital transducers (IDTs) and opto-acousto-optic transducers (OAOTs), researchers ha…
Metastable Charge Distribution Between Degenerate Landau Levels
Wenlu Lin, Xing Fan, Lili Zhao +6
We study two dimensional electron systems confined in wide quantum wells whose subband separation is comparable with the Zeeman energy. Two N = 0 Landau levels from different subba…
Novelty Adaptation Through Hybrid Large Language Model (LLM)-Symbolic Planning and LLM-guided Reinforcement Learning
Hong Lu, Pierrick Lorang, Timothy R. Duggan +2
In dynamic open-world environments, autonomous agents often encounter novelties that hinder their ability to find plans to achieve their goals. Specifically, traditional symbolic p…
Prototype-Guided Concept Erasure in Diffusion Models
Yuze Cai, Jiahao Lu, Hongxiang Shi +2
Concept erasure is extensively utilized in image generation to prevent text-to-image models from generating undesired content. Existing methods can effectively erase narrow concept…
Improved Prognostic Prediction of Pancreatic Cancer Using Multi-Phase CT by Integrating Neural Distance and Texture-Aware Transformer
Hexin Dong, Jiawen Yao, Yuxing Tang +11
Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal cancer in which the tumor-vascular involvement greatly affects the resectability and, thus, overall survival of patients.…
The Price Is Not Right: Neuro-Symbolic Methods Outperform VLAs on Structured Long-Horizon Manipulation Tasks with Significantly Lower Energy Consumption
Timothy Duggan, Pierrick Lorang, Hong Lu +1
Vision-Language-Action (VLA) models have recently been proposed as a pathway toward generalist robotic policies capable of interpreting natural language and visual inputs to genera…
Curiosity-Driven Imagination: Discovering Plan Operators and Learning Associated Policies for Open-World Adaptation
Pierrick Lorang, Hong Lu, Matthias Scheutz
Adapting quickly to dynamic, uncertain environments-often called "open worlds"-remains a major challenge in robotics. Traditional Task and Motion Planning (TAMP) approaches struggl…
ClipGrader: Leveraging Vision-Language Models for Robust Label Quality Assessment in Object Detection
Hong Lu, Yali Bian, Rahul C. Shah
High-quality annotations are essential for object detection models, but ensuring label accuracy - especially for bounding boxes - remains both challenging and costly. This paper in…
Robust micro-magnet design for fast electrical manipulations of single spins in quantum dots
Jun Yoneda, Tomohiro Otsuka, Tatsuki Takakura +9
Tailoring spin coupling to electric fields is central to spintronics and spin-based quantum information processing. We present an optimal micromagnet design that produces appropria…
Few-Shot Neuro-Symbolic Imitation Learning for Long-Horizon Planning and Acting
Pierrick Lorang, Hong Lu, Johannes Huemer +2
Imitation learning enables intelligent systems to acquire complex behaviors with minimal supervision. However, existing methods often focus on short-horizon skills, require large d…
The Intrinsic Energy Resolution of LaBr(Ce) Crystal for GECAM
Pei-Yi Feng, Xi-Lei Sun, Zheng-Hua An +6
This study aims to provide an accurate estimation of the intrinsic resolution of LaBr(Ce) crystal through a combination of experimental and simulation methods. We re-analyzed t…
Self-trapping of a Fermi super-fluid in a double-well potential in the BEC-unitarity crossover
S. K. Adhikari, Hong Lu, Han Pu
We derive a generalized Gross-Pitaevskii density-functional equation appropriate to study the Bose-Einstein condensate (BEC) of dimers formed of singlet spin-half Fermi pairs in th…
On Hybrid (Topologically) Massive Supergravity in Three Dimensions
Hong Lu, Yi Pang
A class of hybrid (topologically) massive off-shell supergravities coupled to an on-shell matter scalar multiplet was recently constructed. The auxiliary field in the off-shell mul…
Signature of Many-Body Localization of Phonons in Strongly Disordered Superlattices
Thanh Nguyen, Nina Andrejevic, Hoi Chun Po +17
Many-body localization (MBL) has attracted significant attention due to its immunity to thermalization, role in logarithmic entanglement entropy growth, and opportunities to reach…
Robust edge photocurrent response on layered Type II Weyl semimetal WTe2
Qinsheng Wang, Jingchuan Zheng, Yuan He +16
Photo sensing and energy harvesting based on exotic properties of quantum materials and new operation principles have great potentials to break the fundamental performance limit of…
Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
Daniel S. Sanchez, Guoqing Chang, Ilya Belopolski +15
Characterized by the absence of inversion symmetry, non-centrosymmetric materials are of great interest because they exhibit ferroelectricity, second harmonic generation, emergent…
Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases
L. O. Baksmaty, Hong Lu, C. J. Bolech +1
It is quite common that several different phases exist simultaneously in a system of trapped quantum gases of ultra-cold atoms. One such example is the strongly-interacting Fermi g…
The Energy Response of LaBr3(Ce), LaBr3(Ce,Sr) and NaI(Tl) Crystals for GECAM
Pei-Yi Feng, Xi-Lei Sun, Zheng-Hua An +19
The GECAM series of satellites utilize LaBr3(Ce), LaBr3(Ce,Sr), and NaI(Tl) crystals as sensitive materials for gamma-ray detectors (GRDs). To investigate the non-linearity in the…
Criticality in Einstein-Gauss-Bonnet Gravity: Gravity without Graviton
Zhong-Ying Fan, Bin Chen, Hong Lu
General Einstein-Gauss-Bonnet gravity with a cosmological constant allows two (A)dS spacetimes as its vacuum solutions. We find a critical point in the parameter space where the tw…
Multiple Superconducting Transitions in α-Sn Films Grown by Molecular Beam Epitaxy
Yuanfeng Ding, Huanhuan Song, Jinshan Yao +4
Gray tin, also known as α-Sn, has been attracting research interest recent years due to its topological nontrivial properties predicted theoretically. The Dirac linear band disper…
Probing a Vision-Language-Action Model for Symbolic States and Integration into a Cognitive Architecture
Hong Lu, Hengxu Li, Prithviraj Singh Shahani +2
Vision-language-action (VLA) models hold promise as generalist robotics solutions by translating visual and linguistic inputs into robot actions, yet they lack reliability due to t…
The Surprising Effectiveness of Weyl Gravity in Probing Quantum Corrections to AdS Black Holes
Liang Ma, Peng-Ju Hu, Yi Pang +1
Computing leading higher curvature contributions to thermodynamic quantities of AdS black hole is drastically simplified once the higher curvature terms are expressed in terms of p…
Harnessing Joint Rain-/Detail-aware Representations to Eliminate Intricate Rains
Wu Ran, Peirong Ma, Zhiquan He +2
Recent advances in image deraining have focused on training powerful models on mixed multiple datasets comprising diverse rain types and backgrounds. However, this approach tends t…
Large Magnetoresistance over an Extended Temperature Regime in Monophosphides of Tantalum and Niobium
Chenglong Zhang, Cheng Guo, Hong Lu +5
We report extremely large magnetoresistance (MR) in an extended temperature regime from 1.5 K to 300 K in non-magnetic binary compounds TaP and NbP. TaP exhibits linear MR around $…
Concomitant Modulated Superfluidity In Polarized Fermionic Gases
L. O. Baksmaty, Hong Lu, C. J. Bolech +1
Recent groundbreaking experiments studying the effects of spin polarization on pairing in unitary Fermi gases encountered mutual qualitative and quantitative discrepancies which se…
Beyond Interestingness: Semantic and Context-Aware Natural Language Query Recommendations for Visual Data Analysis
Xingbo Wang, Siyuan Li, Furui Cheng +5
The paper proposes QRec-NLI, a system that uses large language models to provide semantic- and context‑aware next‑step query recommendations, helping analysts explore multi‑table r…
Evaluating Generalization Ability of Convolutional Neural Networks and Capsule Networks for Image Classification via Top-2 Classification
Hao Ren, Jianlin Su, Hong Lu
Image classification is a challenging problem which aims to identify the category of object in the image. In recent years, deep Convolutional Neural Networks (CNNs) have been appli…
Performance of the Gamma-ray Transient Monitor at the IHEP Electron-Beam Facility
Pei-Yi Feng, Zheng-Hua An, Yu-Hui Li +26
Gamma-Ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit-A (DRO-A) satellite, with the scientific objective of detecting gamma-ray bursts in the…
Transport evidence of the three-dimensional Dirac semimetal phase in doped -Sn grown by molecular beam epitaxy
Yuanfeng Ding, Bingxin Li, Chen Li +3
We report the quantum transport properties of the -Sn films grown on CdTe (001) substrates by molecular beam epitaxy. The -Sn films are doped with phosphorus to tune the Fe…
Multitask Battery Management with Flexible Pretraining
Hong Lu, Jiali Chen, Jingzhao Zhang +3
Industrial-scale battery management involves various types of tasks, such as estimation, prediction, and system-level diagnostics. Each task employs distinct data across temporal s…
Experimental discovery of a topological Weyl semimetal state in TaP
Su-Yang Xu, Ilya Belopolski, Daniel S. Sanchez +24
Weyl semimetals are expected to open up new horizons in physics and materials science because they provide the first realization of Weyl fermions and exhibit protected Fermi arc su…
Anisotropic Fermi Surface and Quantum Limit Transport in High Mobility 3D Dirac Semimetal Cd3As2
Yanfei Zhao, Haiwen Liu, Chenglong Zhang +10
The three-dimensional (3D) topological Dirac semimetal is a new topological phase of matter, viewed as the 3D analogy of graphene with a linear dispersion in the 3D momentum space.…
A deep local attention network for pre-operative lymph node metastasis prediction in pancreatic cancer via multiphase CT imaging
Zhilin Zheng, Xu Fang, Jiawen Yao +10
Lymph node (LN) metastasis status is one of the most critical prognostic and cancer staging factors for patients with resectable pancreatic ductal adenocarcinoma (PDAC), or in gene…
Self-Explanation in Social AI Agents
Rhea Basappa, Mustafa Tekman, Hong Lu +3
Social AI agents interact with members of a community, thereby changing the behavior of the community. For example, in online learning, an AI social assistant may connect learners…
Atomic-scale visualization of quasiparticle interference on a type-II Weyl semimetal surface
Hao Zheng, Guang Bian, Guoqing Chang +15
We combine quasiparticle interference simulation (theory) and atomic resolution scanning tunneling spectro-microscopy (experiment) to visualize the interference patterns on a type-…
Bandgap and Band Offsets Determination of Semiconductor Heterostructures using Three-terminal Ballistic Carrier Spectroscopy
Wei Yi, Hong Lu, Yong Huang +5
Utilizing three-terminal tunnel emission of ballistic electrons and holes, we have developed a method to self-consistently measure the bandgap of semiconductors and band discontinu…
Theoretical prediction of magnetic and noncentrosymmetric Weyl fermion semimetal states in the R-Al-X family of compounds (R=rare earth, Al=aluminium, X=Si, Ge)
Guoqing Chang, Bahadur Singh, Su-Yang Xu +18
Weyl semimetals are novel topological conductors that host Weyl fermions as emergent quasiparticles. While the Weyl fermions in high-energy physics are strictly defined as the mass…
1550 nm compatible ultrafast photoconductive material based on a GaAs/ErAs/GaAs heterostructure
Kedong Zhang, Yiwen Li, Yifeng Ren +8
The sub-bandgap absorption and ultrafast relaxation in a GaAs/ErAs/GaAs heterostructure are reported. The infrared absorption and 1550 nm-excited ultrafast photo-response are studi…
Ultrafast Relaxation Dynamics of Photoexcited Dirac Fermion in The Three Dimensional Dirac Semimetal Cadmium Arsenide
Wei Lu, Shaofeng Ge, Xuefeng Liu +7
Three dimensional (3D) Dirac semimetals which can be seen as 3D analogues of graphene have attracted enormous interests in research recently. In order to apply these ultrahigh-mobi…
A Method for Gamma-Ray Energy Spectrum Inversion and Correction
Zhi-Qiang Ding, Xin-Qiao Li, Da-Li Zhang +13
Accurate spectral analysis of high-energy astrophysical sources often relies on comparing observed data to incident spectral models convolved with the instrument response. However,…
QuestA: Expanding Reasoning Capacity in LLMs via Question Augmentation
Jiazheng Li, Hongzhou Lin, Hong Lu +5
Reinforcement learning (RL) has emerged as a central paradigm for training large language models (LLMs) in reasoning tasks. Yet recent studies question RL's ability to incentivize…
Expansion of 1D polarized superfluids: The FFLO state reveals itself
Hong Lu, L. O. Baksmaty, C. J. Bolech +1
We study the expansion dynamics of a one dimensional polarized Fermi gas after sudden release from confinement using both the mean-field Bogoliubov-de Gennes and the numerically ex…
TRNR: Task-Driven Image Rain and Noise Removal with a Few Images Based on Patch Analysis
Wu Ran, Bohong Yang, Peirong Ma +1
The recent success of learning-based image rain and noise removal can be attributed primarily to well-designed neural network architectures and large labeled datasets. However, we…
SimulFlow: Simultaneously Extracting Feature and Identifying Target for Unsupervised Video Object Segmentation
Lingyi Hong, Wei Zhang, Shuyong Gao +2
Unsupervised video object segmentation (UVOS) aims at detecting the primary objects in a given video sequence without any human interposing. Most existing methods rely on two-strea…
Beam test of CSES silicon strip detector module
Da-Li Zhang, Hong Lu, Huan-Yu Wang +8
The silicon-strip tracker of the China Seismo-Electromagnetic Satellite (CSES) consists of two double-sided silicon strip detectors (DSSDs) which provide incident particle tracking…
Detector performance of the Gamma-ray Transient Monitor onboard DRO-A Satellite
Pei-Yi Feng, Zheng-Hua An, Da-Li Zhang +15
Gamma-ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit-A (DRO-A) satellite with the scientific objective of detecting gamma-ray transients ran…
DC Conductivities from Non-Relativistic Scaling Geometries with Momentum Dissipation
Sera Cremonini, Hai-Shan Liu, Hong Lu +1
We consider a gravitational theory with two Maxwell fields, a dilatonic scalar and spatially dependent axions. Black brane solutions to this theory are Lifshitz-like and violate hy…
Parrot: A Training Pipeline Enhances Both Program CoT and Natural Language CoT for Reasoning
Senjie Jin, Lu Chen, Zhiheng Xi +9
Natural language chain-of-thought (N-CoT) and Program chain-of-thought (P-CoT) have emerged as two primary paradigms for large language models (LLMs) to solve mathematical reasonin…
GlobalMapNet: An Online Framework for Vectorized Global HD Map Construction
Anqi Shi, Yuze Cai, Xiangyu Chen +3
High-definition (HD) maps are essential for autonomous driving systems. Traditionally, an expensive and labor-intensive pipeline is implemented to construct HD maps, which is limit…
Global Structure of Exact Scalar Hairy Dynamical Black Holes
Zhong-Ying Fan, Bin Chen, Hong Lu
We study the global structure of some exact scalar hairy dynamical black holes which were constructed in Einstein gravity either minimally or non-minimally coupled to a scalar fiel…
Combining Cognitive and Generative AI for Self-explanation in Interactive AI Agents
Shalini Sushri, Rahul Dass, Rhea Basappa +2
The Virtual Experimental Research Assistant (VERA) is an inquiry-based learning environment that empowers a learner to build conceptual models of complex ecological systems and exp…
Utilizing Large Language Models for Natural Interface to Pharmacology Databases
Hong Lu, Chuan Li, Yinheng Li +1
The drug development process necessitates that pharmacologists undertake various tasks, such as reviewing literature, formulating hypotheses, designing experiments, and interpretin…
On the quantum spin Hall gap of monolayer 1T'-WTe2
Feipeng Zheng, Chaoyi Cai, Shaofeng Ge +12
Quantum spin Hall (QSH) materials are two-dimensional systems exhibiting insulating bulk and helical edge states simultaneously. A QSH insulator processes topologically non-trivial…
Electronic control of extraordinary terahertz transmission through subwavelength metal hole arrays
Hou-Tong Chen, Hong Lu, Abul K. Azad +5
We describe the electronic control of extraordinary terahertz transmission through subwavelength metal hole arrays fabricated on doped semiconductor substrates. The hybrid metal-se…
Study of the NWC electrons belt observed on DEMETER Satellite
Xinqiao Li, Yuqian Ma, Ping Wang +11
We analyzed observation data collected by the Instrument for the Detection of Particles (IDP) on board of DEMETER satellite during the period of total seventeen months in 2007 and…