超导国家重点实验室 2025 年研究生考核暨学术交流活动

[超导国家重点实验室学术报告]Finite element models for superconducting systems

Given the recent improvements of their physical properties, high-temperature superconductors are increasingly used in many applications ranging from particle accelerators and fusion magnets, to electrical machines and power cables. 

[超导国家重点实验室学术报告]Magnetic landscape of superconducting resonators under radio-frequency excitation

Superconducting resonators are essential components in quantum circuits and highly sensitive sensors. However, their performance is often compromised by magnetic flux penetration, as the interaction of flux quanta and the induced radio-frequency (RF) currents in the superconducting thin film leads to significant energy dissipation. 

[超导基础理论和实验技术系列讲座 (一百二十九) ]ALCHEMY OF THE XXI CENTURY: DIGITAL SYNTHESIS OF QUANTUM MATERIALS

Atomic-layer-by-layer molecular beam epitaxy (ALL-MBE) is a new technique developed in the last few decades to synthesize functional quantum materials, including high-temperature superconductors (HTS), other complex oxides, and two-dimensional materials such as graphene and borophene. It also enables one to synthesize novel metastable materials that cannot be synthesized by standard methods. Several examples will be presented of ALL-MBE alchemy — the creation of artificial materials with novel and unique electronic properties. The ability to engineer the materials at a single-atomic monolayer level has also enabled important discoveries of novel physical phenomena and effects in HTS cuprates and beyond. 

[超导国家重点实验室学术报告]二维自旋电子材料中的拓扑输运与磁电阻效应

二维自旋电子材料因其独特的层间自由度和丰富的自旋相关现象，成为探索新奇量子输运行为和发展高性能自旋电子器件的重要平台。本报告将介绍我们在该领域的最新进展。首先，我们通过自旋过滤效应实现了巨磁阻：利用A型反铁磁半导体构建串联自旋过滤器，获得超过8000%的磁电阻

[超导基础理论和实验技术系列讲座 (一百二十八) ]从宏观量子隧穿到超导量子比特

1962年，Brian Josephson从理论上预言超导Cooper对可以在被一层非常薄的绝缘体隔开的两个超导体之间相干地隧穿，从而电流可以无阻流过绝缘区。这一效应，称为Josephson效应，对超导的基础和应用研究都产生了极其重要的影响。Josephson效应可以理解为超导宏观波函数的隧穿效应，传统上也常被称为一种宏观量子效应。

[超导基础理论和实验技术系列讲座 (一百二十七) ]Prof. Ilya M. Eremin："Magnetic" Mechanism of Unconventional Superconductivity in Bilayer Nickelates: Multiorbital Effects

Recently discovered high-T_c superconductivity in pressurized bilayer nickelate bulk crystals La₃Ni₂O₇ (La-327) and their thin films under compressive strain are believed to be driven by the non-phononic repulsive interaction. Depending on the strength of the interlayer repulsion, the symmetry of the superconducting order parameter is expected to be either d-wave or sign-changing bonding-antibonding s±-wave order parameter, respectively. 

[超导基础理论和实验技术系列讲座 (一百二十六) ] 卢仲毅：关联电子材料的电子结构计算方法的发展和应用

基于密度泛函理论的电子结构计算（DFT）与动力学平均场理论（DMFT）相结合的DFT+DMFT电子结构计算方法是研究关联电子材料最有力和最有前景的方法。已有的DFT+DMFT由于量子蒙特卡洛杂质求解器的负符号问题而不能处理阻挫关联电子材料，而阻挫关联电子材料往往呈现许多奇异的量子物理现象。2014年我们提出自然轨道重正化群方法（NORG）。该方法非常适合处理多轨道多格点的量子杂质系统，并适合于作为动力学平均场理论的杂质求解器

[超导基础理论和实验技术系列讲座 (一百二十五) ] Prof. Ziqiang Wang：Extraordinary Superconducting Matter

n ordinary superconductors, an external magnetic field is needed to generate magnetic vortices. We discuss two examples where this conventional folklore breaks down. The first example is superconductors with strong spin-orbit coupling. We show that topological defect excitations, dubbed quantum anomalous vortex (QAV), can nucleate around magnetic ions spontaneously in the absence of external magnetic fields.

[超导基础理论和实验技术系列讲座 (一百二十四) ]袁辉球：量子相变与非常规超导

在重费米子等强关联电子材料体系中，磁场、压力、掺杂等非温度参量可以用来调控电荷、自旋、轨道、晶格等自由度间的耦合，诱导诸如非常规超导、奇异金属以及关联拓扑态等奇异电子性质，并可实现对不同量子态的调控，导致丰富的量子临界行为。