Yanwu Xie

Jan 14, 2025 | link.aps.org | Yishuai Wang |Yi Zhou |Yanwu Xie

Superconductors, materials that can carry electrical current without resistance, are invaluable for both fundamental research and technological innovation. At the heart of superconductivity are Cooper pairs: electron pairs that move without scattering. The density of these pairs, known as the superfluid density, plays a crucial role in determining a material’s superconducting properties.

Jan 8, 2025 | nature.com | Peiran Tong |Meng Zhang |Haizhong Guo |Zijian Hong |Yanwu Xie |He Tian

AbstractParticle-like topological structures such as polar skyrmions in ferroelectrics have the potential for application in high-density information storage. Since the polar topologies arise from a complicated competitive energy balance, such non-trivial topological states are difficult to manipulate by applying non-persistent external stimuli, such as bias or strain. Thus, a flexible strategy for manipulating topological polar states is needed to realize ultrahigh-density topological devices.

Sep 4, 2024 | nature.com | Xiaoyang Chen |Tianlun Yu |Meng Zhang |Fatima Alarab |Vladimir N. Strocov |Yilin Wang | +5 more

AbstractEmergent superconductivity at the LaAlO3/KTaO3 interfaces exhibits a mysterious dependence on the KTaO3 crystallographic orientations. Here by soft X-ray angle-resolved photoemission spectroscopy, we directly resolve the electronic structure of the LaAlO3/KTaO3 interfacial superconductors and the non-superconducting counterpart. We find that the mobile electrons that contribute to the interfacial superconductivity show strong k⊥ dispersion.