Numerical evidence of pair density wave superconductivity in strongly correlated systems
Oral Talk 1: Kinetic Energy Driven Ferromagnetic Insulator
Oral Talk 3: Superconductivity enhancement and particle-hole asymmetry: interplay with
Oral Talk 5: Exploring Magnetization Switching: Insights from Macrospin and Atom
istic Simulations
Oral Talk 6: Robust topological interface states in a lateral magnetic-topological heterostructure
Oral Talk 8: Ultrahigh Oxygen Ion Mobility in Ferroelectric Hafnia
Oral Talk 9: Symmetry-driven anisotropic coupling effect in antiferromagnetic topo
logical insulator: Mechanism for a quantum anomalous Hall state with a high Chern number
Oral Talk 10: Fractional magnetization plateau and spinon quantum spin Hall state in
kagome antiferromagnets
Oral Talk 13: Recent progress of Dark SHINE R&D
Oral Talk 14: DarkSHINE Simulation software framework
Oral Talk 16: Learning noise-induced transitions by multi scaling reservoir computing
Oral Talk 17: Reweight-annealing method: from free energy to quantum entanglement
Oral Talk 15: The Impact of Sky Model Defects on SKA EoR Experiments: A Source Blending Case Study
Oral Talk 19: 3D GRMHD Simulations of Tilted Disks: Magnetically Driven Retrograde
Precession
Oral Talk 20: Numerical investigation of instabilities in over-pressured magnetizedrel
ativistic jet
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
Oral Talk 23: Observation of floating surface state in obstructed atomic insulator can
didate NiP2
Oral Talk 24: Phase engineering of giant second harmonic generation in Bi2O2Se
Oral Talk 25: Revealing the spatial nature of sublattice symmetry
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
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....
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]。
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...
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,...
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...
Sci. China-Phys. Mech. Astron., 66(1): 211062 (2023)
Nucl. Sci. Tech.35,148(2024)
Nucl. Sci. Tech.35,201(2024)
arXiv:2407.17800 [NST-2024-0554]
arXiv:2407.20723
arXiv:2401.15477...
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...
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...
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...
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...
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...
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。
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,...
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。
