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Yi-Fan Jiang (上海科技大学)17/12/2024, 10:30
Numerical evidence of pair density wave superconductivity in strongly correlated systems
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Qihang Liu (SUSTech)17/12/2024, 13:00
Symmetry theory of magnetic geometry
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The physical properties in magnetic-ordered materials were ultimately believed to
rely on the symmetry theory of magnetic groups. Recently, it has come to light
that a more comprehensive group, known as spin (crystallographic) group, which
combines separate spin and spatial operations, is necessary to fully characterize
the geometry and underlying... -
锦缘 叶 (西湖大学)17/12/2024, 13:40Oral Talk 口头报告
Oral Talk 1: Kinetic Energy Driven Ferromagnetic Insulator
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萧宇 阎 (南方科技大学)17/12/2024, 14:00Oral Talk 口头报告
Oral Talk 2: 笼目超导体中的配对密度波和残余费米态
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至 许 (上海科技大学)17/12/2024, 14:20Oral Talk 口头报告
Oral Talk 3: Superconductivity enhancement and particle-hole asymmetry: interplay with
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鹏飞 刘 (南方科技大学)17/12/2024, 14:40Oral Talk 口头报告
Oral Talk 4: 磁性材料中的自旋群对称性
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雪 张 (上海科技大学)17/12/2024, 15:20Oral Talk 口头报告
Oral Talk 5: Exploring Magnetization Switching: Insights from Macrospin and Atom
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istic Simulations -
群 牛 (上海科技大学)17/12/2024, 15:40Oral Talk 口头报告
Oral Talk 6: Robust topological interface states in a lateral magnetic-topological heterostructure
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勇 黄 (南京大学)17/12/2024, 16:00Oral Talk 口头报告
Oral Talk 7: Topological phase transition in Fe(Te, Se)
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丽洋 马 (西湖大学)17/12/2024, 16:20Oral Talk 口头报告
Oral Talk 8: Ultrahigh Oxygen Ion Mobility in Ferroelectric Hafnia
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怡良 范 (南京大学)17/12/2024, 16:40Oral Talk 口头报告
Oral Talk 9: Symmetry-driven anisotropic coupling effect in antiferromagnetic topo
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logical insulator: Mechanism for a quantum anomalous Hall state with a high Chern number -
黎伟 何 (南京大学)17/12/2024, 17:00Oral Talk 口头报告
Oral Talk 10: Fractional magnetization plateau and spinon quantum spin Hall state in
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kagome antiferromagnets -
17/12/2024, 18:00Poster 海报
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庆东 蒋 (上海交通大学)18/12/2024, 09:00
从卡西米尔效应到微腔量子材料
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永明 张 (南方科技大学)18/12/2024, 09:40Oral Talk 口头报告
Oral Talk 11: 胶体伊辛自旋动力学的熵标度律
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圣强 赵 (南京大学)18/12/2024, 10:00Oral Talk 口头报告
Oral Talk 12: 颗粒物质非线性混沌特性及混沌量子化描述研究
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Zhiyu Zhao (上海交通大学)18/12/2024, 10:40Oral Talk 口头报告
Oral Talk 13: Recent progress of Dark SHINE R&D
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Xuliang Zhu (上海交通大学)18/12/2024, 11:00Oral Talk 口头报告
Oral Talk 14: DarkSHINE Simulation software framework
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Chen Xie (南京大学)18/12/2024, 11:20Oral Talk 口头报告
Oral Talk 15: BESIII 上 (奇) 粲介子弱衰变研究
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泽群 林 (西湖大学)18/12/2024, 13:00Oral Talk 口头报告
Oral Talk 16: Learning noise-induced transitions by multi scaling reservoir computing
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Yi-Ming Ding (西湖大学)18/12/2024, 13:20Oral Talk 口头报告
Oral Talk 17: Reweight-annealing method: from free energy to quantum entanglement
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Chenxi Shan (上海交通大学)18/12/2024, 13:40Oral Talk 口头报告
Oral Talk 15: The Impact of Sky Model Defects on SKA EoR Experiments: A Source Blending Case Study
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Hongxuan Jiang (上海交通大学)18/12/2024, 14:00Oral Talk 口头报告
Oral Talk 19: 3D GRMHD Simulations of Tilted Disks: Magnetically Driven Retrograde
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Precession -
旭凡 胡 (上海交通大学)18/12/2024, 14:20Oral Talk 口头报告
Oral Talk 20: Numerical investigation of instabilities in over-pressured magnetizedrel
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ativistic jet -
Weijie Deng (上海科技大学)18/12/2024, 15:00Oral Talk 口头报告
Oral Talk 21: 基于太赫兹近场光学显微镜(SNoiM) 对固态微纳结构中热电子的表征研究
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铭 吕 (上海科技大学)18/12/2024, 15:20Oral Talk 口头报告
Oral Talk 22: 滑移铁电的扫描探针显微镜研究
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祥瑞 刘 (南方科技大学)18/12/2024, 15:40Oral Talk 口头报告
Oral Talk 23: Observation of floating surface state in obstructed atomic insulator can
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didate NiP2 -
Zhefeng Lou (西湖大学)18/12/2024, 16:00Oral Talk 口头报告
Oral Talk 24: Phase engineering of giant second harmonic generation in Bi2O2Se
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荣 肖 (南京大学)18/12/2024, 16:20Oral Talk 口头报告
Oral Talk 25: Revealing the spatial nature of sublattice symmetry
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金超 郑 (中国江苏省南京市南京大学鼓楼校区)18/12/2024, 16:40Oral Talk 口头报告
Oral Talk 26: Search for Pair Production of Boosted Higgs Bosons via Vector-Boson Fusion in the bb¯bb¯ Final State Using pp Collisions at s√=13TeV with the ATLAS Detector
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Mr Hongxuan Jiang (Tsung-Dao Lee Institute, Shanghai JiaoTong University)Oral Talk 口头报告
Accretion disks around black holes are generally thought to be misaligned with the black hole’s spin axis due to the random angular momentum of infalling gas. In such systems, the black hole’s rotation twists the surrounding spacetime, influencing the dynamics of the accretion flow and its magnetic fields. The precession of tilted disks is commonly attributed to the Lense Thirring effect....
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chen xie (南京大学)Oral Talk 口头报告
粲介子与奇异粲介子是其介子家族的基态粒子，其衰变只能通过弱作用改变其味道，我们将介绍奇异粲介子纯轻衰变的研究，因其夸克对湮灭成W玻色子，强弱作用直接分离，成为天然的抽取CKM矩阵元的衰变道[PhysRevD.108.092014]，同时将介绍粲介子半轻衰变研究，与纯轻衰变相比，半轻末态中存在强子参与，微分跃迁率依赖于W带走的动量，再考虑末态强子自旋信息，我们抽取了强子化形状因子，并对角分布系数的不对称性进行测量[内部draft阶段]。
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Xuliang ZhuOral Talk 口头报告
This talk introduces the DarkSHINE Simulation software. DarkSHINE is a fixed-target dark photon search experiment based at Shanghai SHINE facility. The DarkSHINE Simulation software integrates generator, simulation, digitization, reconstruction, and analysis chain. There are three main parts, DSimu, DAna, and DDis. DSimu is a simulation software based on Geant4 and ROOT, characterized by...
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Xue Zhang (上海科技大学)Oral Talk 口头报告
In 1935, Landau and Lifshitz proposed an equation to describe the dynamics of a single magnetic moment under the influence of external magnetic fields. In 1955, Gilbert extended this theory by modifying the damping term, resulting in the Landau-Lifshitz-Gilbert equation. This is the foundation of the macrospin and atomistic models. The macrospin model simplifies a magnetic system as a single,...
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黎伟 何 (南京大学物理学院)Oral Talk 口头报告
Abstract:
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The kagome lattice is an exceptional platform for exploring novel many-body states, owing to its distinctive lattice and electron structures. Motivated by very recent experimental observations of the 1/9-magnetization plateaus in YCu3(OH)$_{6+x}$Br$_{3−x}$ and YCu3(OD)$_{6+x}$Br$_{3−x}$, our study delves into the magnetic-field-induced phase transitions in the nearest-neighbor... -
Jin-yuan Ye (Westlake University)Oral Talk 口头报告
We construct a minimal model of interacting fermions establishing a ferromagnetic insulating phase. It is based on the Hubbard model on a trimerized triangular lattice in the regime of $U\gg t\gg |t^\prime|$ with $t>0$ and $t^\prime$, the intra- and inter-trimer hopping amplitudes respectively. At the $\frac{1}{3}$-filling, each trimer becomes a triplet spin-1 moment, and the inter-trimer...
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泽群 林 (西湖大学)Oral Talk 口头报告
Noise is usually regarded as adversarial to extracting effective dynamics from
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time series, such that conventional approaches usually aim at learning
dynamics by mitigating the noisy effect. However, noise can have a functional
role in driving transitions between stable states underlying many stochastic
dynamics. We find that leveraging a machine learning model, reservoir com
puting,... -
Baihong ZhouPoster 海报
Quantum entanglement is a hallmark feature of quantum mechanics, manifesting as correlations between subsystems that cannot be fully described without one another, regardless of spatial separation. While entanglement has been observed in processes such as $pp \rightarrow t\bar{t}$ and thoroughly analyzed in Higgs decay channels ($H \rightarrow VV$) at the Large Hadron Collider (LHC), it...
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旭凡 胡Oral Talk 口头报告
Relativistic jets from active galactic nuclei are observed to be collimated on parsec scales. When there is a pressure mismatch between the jet and the ambient medium, recollimation shocks and rarefaction shocks can form. In this talk, I will review the current progress in jet numerical simulation at first. And then I will present our recent relativistic magnetohydrodynamic (RMHD) simulations...
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祥瑞 刘 (南方科技大学物理系)Oral Talk 口头报告
近年来随着对拓扑材料分类研究的深入，人们发现在部分拓扑平庸的绝缘体材料中会存在局域在非原子占据位点的电荷。这一类材料被命名为阻塞原子绝缘体[1, 2]。如果材料表面恰好切过这些位点，会在界面上给出分数填充的电荷和金属性的阻塞表面态[3]。在本研究中，我们利用角分辨光电子能谱和密度泛函理论对一种阻塞原子绝缘体候选材料NiP2中的漂浮表面态进行了系统研究[4]。区别于先前报道的阻塞原子绝缘体材料中的表面态[5,...
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Mr Zhefeng Lou (Westlake University)Oral Talk 口头报告
Two-dimensional (2D) materials with remarkable second-harmonic generation (SHG) hold great promise for future on-chip nonlinear optics. Nevertheless, relevant materials possessing both scalable SHG response and environmental stability are rare. Here, we demonstrate the enormous SHG resulting from the phase engineering of a high-performance semiconductor, Bi$_2$O$_2$Se (BOS), under uniaxial...
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Danning Liu (TDLI/SJTU)Poster 海报
This study provides the most updated experimental constraints on neutral triple gauge couplings utilizing the latest nTGC formulation. A fully gauge-invariant treatment SU(2)xU1) symmetry is employed to correct the overestimations extracted in previous analyses, and to deliver the first results with improved statistics and precision.
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Zhiyu Zhao (Tsung-Dao Lee Institute, Shanghai Jiao Tong Univ. (CN))Oral Talk 口头报告
Sci. China-Phys. Mech. Astron., 66(1): 211062 (2023)
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Nucl. Sci. Tech.35,148(2024)
Nucl. Sci. Tech.35,201(2024)
arXiv:2407.17800 [NST-2024-0554]
arXiv:2407.20723
arXiv:2401.15477... -
Mr 荣 肖 (南京大学物理学院)Oral Talk 口头报告
The sublattice symmetry on a bipartite lattice is commonly regarded as the chiral symmetry in the AIII class of the tenfold Altland--Zirnbauer classification. Here, we reveal the spatial nature of sublattice symmetry, and show that this assertion holds only if the periodicity of primitive unit cells agrees with that of the sublattice labeling. In cases where the periodicity does not agree,...
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Yi-Ming Ding (Westlake University)Oral Talk 口头报告
Calculating normalizing factors or generalized partition functions in quantum Monte Carlo simulations is a fundamental problem throughout many scientific and statistical scenarios. Here, in the framework of stochastic series expansion, we present an efficient scheme based on reweighting and importance sampling to calculate generalized partition functions. We prove that our scheme requires...
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Qn Niu (ShanghaiTech University School of Physical Science and Technology)Oral Talk 口头报告
Introducing uniform magnetic order in two-dimensional topological insulators (2D TIs) by constructing heterostructures of TI and magnet is a promising way to realize the high-temperature Quantum Anomalous Hall effect. However, the topological properties of 2D materials are susceptible to several factors that make them difficult to maintain, and whether topological interface states (TISs) can...
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金超 郑 (中国江苏省南京市南京大学鼓楼校区)Oral Talk 口头报告
A search for Higgs boson pair production via vector-boson fusion is performed in the Lorentzboosted regime, where a Higgs boson candidate is reconstructed as a single large-radius jet, using 140 $fb^{-1}$ of proton–proton collision data at $\sqrt{s} = 13 TeV$ recorded by the ATLAS detector at the Large Hadron Collider. Only Higgs boson decays into bottom quark pairs are considered. The search...
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Mr 至 许 (上海科技大学)Oral Talk 口头报告
The role of near-neighbor electron attraction V in strongly correlated systems has been at the forefront of recent research of unconventional superconductivity. However, its implications in the doped Hubbard model on expansive systems remain predominantly unexplored. In this study, we employ the density-matrix renormalization group to examine its effect in the lightly doped t-t′-Hubbard model...
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怡良 范 (南京大学)Oral Talk 口头报告
Antiferromagnetic (AFM) topological insulators (TIs), which host magnetically gapped Dirac-cone surface states and exhibit many exotic physical phenomena, have attracted great attention. Here, we find that the coupled surface states can be intertwined to give birth to a set of $2n$ unique new Dirac cones, dubbed intertwined Dirac cones, through the anisotropic coupling enforced by crystalline...
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Chenxi ShanOral Talk 口头报告
Twenty-one-centimetre signals from the Epoch of Reionization (EoR) are expected to be detected in the low-frequency radio window by the next-generation interferometers, particularly the Square Kilometre Array (SKA). However, precision data analysis pipelines are required to minimize the systematics within an infinitesimal error budget. Consequently, there is a growing need to characterize the...
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Yong Huang (Nanjing University)Oral Talk 口头报告
A topological phase transition can be induced by controlling topological bands through changes in chemical composition, application of strain, external fields, and so on. In the iron-based superconductor Fe(Te,Se), a topological phase transition is expected by changing Te/Se compositions, and it is considered a promising route to manipulating the topologically superconducting states and...
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Liyang Ma (Westlake University)Oral Talk 口头报告
Ferroelectrics and ionic conductors are important functional materials, each supporting a plethora of applications in information and energy technology. The underlying physics governing their functional properties is ionic motion, and yet studies of ferroelectrics and ionic conductors are often considered separate fields. Based on first-principles calculations and deep-learning-assisted...
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Weijie Deng (ShanghaiTech University)Oral Talk 口头报告
现代信息通讯，数据处理等使用需求对半导体器件性能提出了更高的要求。加大单元器件的工作电压是一种主要的性能提升手段。此时，电压引起的局域强电场会将半导体中的电流载流子（如电子）激发到较高能态，成为热电子，即电子温度Te远大于晶格温度TL。如今，对热电子以及相关现象的研究已经成为半导体微纳器件中的一个重要课题。例如，在III-V半导体导电通道中，饱和工作条件下局域电子温度可高达2000K，远大于晶格升温（通常为几十K）。热电子相关效应很可能带来器件变性，甚至击穿风险。本课题组开发的太赫兹近场显微镜(SNoiM)在过去已经展示了其对热电子的实空间高分辨(~40nm)表征能力。基于该技术实现了实空间高分辨热电子温度分布成像。作为演示，报告将通过SNoiM热电子表征，实现了在器件变性初期的表面损伤探测。
参考文献：
- Qianchun Weng...
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ming lv (shanghaitech university)Oral Talk 口头报告
众所周知，铁电材料的尺寸效应使其无法满足半导体集成中的小型化，低维化要求。通过微纳加工，将二维材料以特定的次序堆垛，打破层间中心反演对称性，可以对大多数常见二维材料赋予铁电性，且这种铁电可以通过层间滑移实现铁电翻转，比传统铁电功耗更低，读写速度更快，尺寸可以压缩至两个原子层内。层间引入转角还可以形成莫尔铁电畴，可以对目标材料进行无栅压的调控。扫描探针显微镜作为一种研究低维材料微观物性的得力工具，可以对滑移铁电和莫尔铁电畴进行应力和电场调控，研究该新型铁电的各种电学性质。目前本人观察到了莫尔铁电隧穿结特殊的电流回滞曲线和应力作用下铁电的滑移翻转，还在三层滑移铁电结构中观察到了铁电的逐层翻转。目前有关工作结果发表在了《Advanced Materials》、《Nature communications》和《Nature Nanotechnology》上。
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鹏飞 刘 (南方科技大学)Oral Talk 口头报告
对称性决定了固体中准粒子激发的波函数包括几何相位、选择规则和简并等行为方式，因此一直是凝聚态物理和材料化学的核心之一。三维晶体，包括无自旋轨道耦合和有自旋轨道耦合的非磁材料和有自旋轨道耦合的磁性材料的对称性被认为是由点群，空间群，磁点群和磁空间群所描述。然而，由轻元素构成的自旋轨道耦合可忽略的磁性材料的对称性却很少被研究。
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我们系统地探究了忽略自旋轨道耦合的磁性材料电子结构的对称性，发现这种情况比考虑自旋轨道耦合的对称性高很多。一种自旋转动与空间转动部分耦合的对称群--自旋群，可应用于完备地描述这种近似下的对称性。相比传统磁群，自旋群允许更多的对称性，因此能够保护更高重的简并。这意味着磁性材料中有更多的拓扑态尚未被研究。我们用对称性分析和紧束缚模型的方法讨论了由自旋群对称性保护的非传统Z2绝缘拓扑相。同时黑白晶格的自旋群可以导出一种特殊SU(2)对称性，由此一种手性类狄拉克费米子得... -
萧宇 阎 (南方科技大学)Oral Talk 口头报告
笼目超导体AV₃Sb₅ (A = K, Rb, Cs) 系列因其复杂的量子态和潜在的拓扑特性受到广泛关注。我们近期的工作利用常规和约瑟夫森扫描隧道显微镜以及准粒子干涉（QPI）技术，在极低温（30 mK）下对AV₃Sb₅ (A = K, Rb, Cs)系列的电子结构进行了高分辨测量，揭示了其手性配对密度波（Chiral Pair Density Wave, PDW）、残余费米弧、电荷密度波（Charge Density Wave,...
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Yongming Zhang (Southern University of Science and Technology (SUSTech))Oral Talk 口头报告
液体的扩散系数和粘度等输运过程的速率与其微观结构密切相关，输运系数可表达成结构剩余熵的自然指数形式，称为熵标度率。这一关系的意义在于它把液体的结构与动力学联系在一起。本工作在自旋系统中研究结构-动力学关系，探索将熵标度率拓展到自旋系统的可行性。实验上，我们通过准二维密排胶体球的屈曲特征，建立了其与反铁磁伊辛自旋的对应关系。通过多光阱阵列技术，实现了胶体自旋晶格的原位形变。另外，通过调控胶球间相互作用，实现了反铁磁-顺磁-铁磁耦合特性的转变。利用这些实验手段，并结合视频显微镜与胶体自旋跟踪技术，我们测量了自旋弛豫时间与结构熵随剪应变、体应变、自旋耦合强度三个控制参数的依赖关系。三组实验均表明，自旋弛豫时间可表达为结构熵的自然指数形式，与液体输运系数的熵标度率一致。本工作首次在自旋系统中实验验证了动力学的熵标度率，为拓展这一结构-动力学关系建立了实验基础。
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圣强 赵 (南京大学物理学院)Oral Talk 口头报告
颗粒物质是物理学研究中的一个热点，其运动特征的研究备受关注，但有关研究仍不充分，尤其是大量颗粒在一定作用下的运动特征。因此，本研究聚焦于颗粒体系的运动特征，深入探究其非线性混沌特性。通过构建离散元模型，观测颗粒的复杂运动行为，运用非线性动力学理论剖析其混沌产生机制与演化规律。此外，本研究内容引入概率分布方法对混沌现象进行刻画，旨在揭示颗粒体系动力学行为的内在联系，为颗粒物质相关领域如物理学、工程学等提供全新的理论视角与数据支撑，助力进一步理解复杂颗粒体系的奇异动力学特性及其潜在应用价值的开发。
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