Coherent exploration and manipulation of quantum materials

量子材料系统中，电子和结构自由度的远程相干性，与强相互作用相一致，产生了新的物质量子相，处于现代科学的前沿。它们的基本激发使我们得以瞥见最先进的粒子加速器无法企及的罕见现象，它们在日常生活中的技术应用数不胜数，从手机和电动汽车中的锂离子电池，核磁共振成像仪中的超导线圈，到高清电视屏幕上的量子点。然而，其他量子材料，例如高温超导体，体现了现代物理学中悬而未决的问题，在它们被发现近三十年后，我们仍然无法完全理解它们。******在UBC的研究小组中，我们开发了最先进的高分辨率光谱工具，采用可见光，紫外线和x射线辐射来探测凝聚态物理前沿这些量子材料的表面和体电子特性。例如，在最近的发现基金期间，我们使用新的脉冲激光和同步加速器测量能力进行了铜酸盐中电子自组织的开创性实验，以及钌酸盐和铁基超导体中的相对论效应。总之，这些成就为我们对非常规和高温超导的理解做出了重大贡献。此外，利用我们小组首创的原位表面处理技术，我们能够将石墨烯从二维半金属转变为超导体，这是一项技术突破。******在这个项目中，我的团队有才华的学生、博士后和研究人员，我们寻求在量子材料的平衡和动态光谱研究方面取得成功，同时扩展到量子操纵的新领域。为此，我们试图通过吸附原子沉积、多轴应变和不同波长的脉冲激光源来建立晶体和电子结构的相干控制。通过这种多管齐下的方法，我们可以继续探索更广泛的科学界在智力和技术上都感兴趣的新型量子材料，将固态的已知极限推向量子物质的全新阶段。

Quantum materials systems wherein long-range coherence in the electronic and structural degrees of freedom, in concert with strong interactions, give rise to new quantum phases of matter lie at the forefront of modern science. Their fundamental excitations yield glimpses into rare phenomena beyond the reach of even the most advanced particle accelerators, and their technological applications in daily life are myriad, ranging from Li-ion batteries in cell phones and electric vehicles, superconductive coils in MRI machines, and quantum dots in high-definition television screens. Yet other quantum materials, such as for example high-temperature superconductors, embody the outstanding open questions in modern physics and continue to elude our full understanding, nearly three decades after their discovery.******In my research group based at UBC, we develop state-of-the-art, high-resolution spectroscopic tools employing visible, ultraviolet, and x-ray radiation to probe the surface and bulk electronic properties of these quantum materials at the frontier of condensed matter physics. For example, during the most recent Discovery Grant period, we used new pulsed laser and synchrotron measurement capabilities to perform groundbreaking experiments on self-organization of electrons in cuprates, as well as relativistic effects in ruthenates and iron-based superconductors. Together, these achievements provided major contributions to our understanding of unconventional and high-temperature superconductivity. Additionally, using in situ surface manipulation techniques pioneered in my group, we were able to turn graphene a 2D semi-metal into a superconductor, a technological breakthrough.******In this program, with my team of talented students, postdocs, and research staff we seek to build upon successes in both the equilibrium and dynamical spectroscopic study of quantum materials while expanding into new territories of quantum manipulation. To do so, we seek to establish coherent control of both crystal and electronic structures via adatom deposition, multiaxial strain, and pulsed laser sources of various wavelengths. By this multipronged approach, we may continue to explore novel quantum materials of both intellectual and technological interest to the wider scientific community, pushing the known limits of solid state towards altogether new phases of quantum matter.