腾讯会议：327-652-632（会议密码0402）

主持人：刘刚钦 研究员

联系人：柯  芬 (82649929  kefen@iphy.ac.cn)

报告摘要
A central goal of condensed-matter physics is to understand and control the interactions that give rise to complex collective states. Pressure is a clean and powerful tuning parameter that reshapes bonding and electronic structure, stabilizing phases—including superconductivity and magnetism—that are often inaccessible under ambient conditions. Diamond anvil cells (DACs) are widely used to reach such extreme pressures, but directly probing local magnetism inside a DAC has remained a long-standing challenge.

In this talk, I will present a quantum-enabled measurement strategy—a “quantum microscope” for extreme conditions—that turns the diamond anvil itself into a multifunctional analytical platform, allowing us to “see” the physics at high pressure. By engineering near-surface nitrogen-vacancy (NV) defect centers in diamond and reading them out optically, we perform in situ, spatially resolved magnetic imaging under extreme conditions. This approach enables direct imaging of superconducting responses—Meissner flux expulsion and flux trapping—while the same samples are simultaneously characterized by transport measurements and complementary structural and chemical probes. I will highlight recent results on high-Tc superconductivity in pressurized bulk nickelates La3Ni2O7-δ and superhydrides LaHx, where we observe pronounced micron-scale variations in superconducting behavior at high pressure. I will discuss how correlating magnetic maps with chemistry and stress helps disentangle competing mechanisms and build quantitative structure–property links for understand the mechanism of superconductivity and other emergent phases under extreme conditions. Finally, I will conclude with a brief outlook on extending this approach to two-dimensional quantum sensing platforms.

报告人简介
陈碧娟博士2011年毕业于四川大学并获学士学位，2016年于中国科学院物理研究所获博士学位。此后，她先后在北京高压科学研究中心（2016—2022，合作导师：丁阳研究员）、哈佛大学物理系（2022—2025，合作导师：Norman Yao 教授）和普渡大学物理系（2025年至今，合作导师：Tongcang Li 教授）开展博士后研究。陈博士长期从事极端条件下量子材料研究，重点发展基于金刚石 NV 色心和六方氮化硼自旋缺陷的量子传感技术，并将其应用于高压环境下局域磁性、应力的原位探测以及低维材料的纳米尺度成像。近年来，她建立了集成于金刚石对顶砧（DAC）的量子传感平台，实现了超过 190 GPa 条件下的空间分辨磁成像，为揭示高压超导体（如氢化物和镍氧化物）的微观机制提供了关键手段。此外，她的研究还结合多种先进实验技术，包括同步辐射谱学（如共振非弹性X射线散射、X射线拉曼散射和X射线吸收谱等）、电输运测量以及理论建模，系统研究量子功能材料在极端条件下的电子结构演化与新奇量子相行为。近五年来，以第一作者身份在 Nature 和 Physical Review Letters 等国际知名期刊发表论文3篇，其中 1 篇获编辑推荐，H因子17。申请中国发明专利4项、美国发明专利1项。2016至2022年期间，参与国家自然科学基金及中物院挑战者计划等科研项目2项。

代表性论文

* 共同第一作者；† 通讯作者

[1] B. J. Chen†, Y. Gu, D. Wang, D. Shao, W. Deng, X. Han, M. Jin, J. Song, Y. Zeng, H. Ishii, Y. Liao, D. Zhang, J.Zhang, Y. Long, J. Zhu, L. Yang, H. Xiao, J. Nei, Y. Shi, C. Jin, J. Hu, H. Mao, and Y. Ding†. Phys. Rev. Lett. 136, 096505 (2026). Editors’ Suggestion

[2] S. V. Mandyam*, E. Wang*, Z. Wang*, B. J. Chen *, N. C. Jayarama, A. Gupta, E. A. Riesel, V. I. Levitas, C. R. Laumann, N. Y. Yao, Nature 651, 54–60 (2026).

[3] B. J. Chen†, M. Tian, J. Zhang, B. Li, Y. Xiao, P. Chow, C. Kenney-Benson, H. Deng, J. Zhang, R. Sereika, X. Yin, D. Wang, X. Hong, C. Q. Jin, Y. Bi, H. Liu, H. Liu, J. Li, K. Jin, Q. Wu, J. Chang, Y. Ding†, and H. Mao. Phys. Rev. Lett. 129, 016401 (2022).

欢迎感兴趣的博士后进行相互交流，欢迎各位老师和同学们参加！