[超导基础理论和实验技术系列讲座 (一百三十二) ]从铜基、铁基和镍基超导体的共性谈非常规高温超导

Bardeen-Cooper-Schrieffer在1957年创立了著名的BCS理论，第一次让人类认识到超导发生的根本原因是电子系统配对以后发生凝聚，形成一个宏观量子相干态。该理论认为电子配对是通过交换虚声子而发生的，因此在该理论框架下高温超导就需要好的库伦屏蔽、高德拜温度和强的电声子耦合。

[超导基础理论和实验技术系列讲座 (一百三十一) ]The Evolution of High-Temperature Superconductors: The "Bronze Age," "Iron Age," "Nickel Age," and Beyond

This presentation traces the historical development of high-temperature superconductors, focusing on significant materials classes such as cuprates, cobaltates, iron pnictides, chalcogenides, topological insulators, and nickelates.

[超导基础理论和实验技术系列讲座 (一百三十) ]Spin correlations in unconventional superconductors

Despite nearly four decades of intensive research on cuprate superconductors, the microscopic pairing mechanism responsible for high-temperature superconductivity remains elusive. This long-standing challenge has driven the search for copper-free unconventional superconductors, which can provide complementary insights and tighter constraints on the essential ingredients for high-Tc ​ pairing.

[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。

[超导基础理论和实验技术系列讲座 (一百二十三) ]Prof. Zhenyu Zhang：Helicity and Chirality in Quantum Materials

Helicity and chirality are fundamental and widespread phenomena in nature. In this talk, I attempt to cover several aspects of helicity and chirality in quantum materials, including helical or chiral structural formation out of achiral building blocks, chiral magnetic excitations in two-dimensional (2D) quantum magnets, and emergence of chiral phonons in otherwise achiral or nonmagnetic 2D lattices.