Metals under extreme conditions

了解金属在极端条件下的电子特性，例如在高压或限制下，对未来的技术应用至关重要，并且从基础科学的角度来看具有相当大的兴趣。我们的项目将使我们能够详细研究电子性质作为压力和限制的函数，以及相应的原子迁移率，结构相变和结晶的变化。此外，还将建立基于电子特性的奈特位移和自旋弛豫的理论模型，以及自扩散和高压对金属纳米结构的影响。我们的研究将包括固体和液态金属，如镓、钠、铅、锡和选定的合金（Ga-In、Ga-Sn、Na-K），这些金属在高压下嵌入介孔基质中，与各种纳米结构的表面相互作用。主要的实验技术将是高场核磁共振（NMR），结合新的突破性的高灵敏度千兆帕斯卡压力电池，即高达200kbar或20gpa。将采用互补磁强计和超声波光谱学。

The understanding of the electronic properties of metals under extreme conditions, e.g., under high pressure or confinement, are vital for future technological applications, and of considerable interest from a fundamental science point of view. Our project will enable us to carry out a detailed study of the electronic properties as a function of pressure and confinement, as well as the corresponding changes of the atomic mobility, structural phase transitions, and crystallization. Additionally, theoretical models for the Knight shift and spin relaxation that follow from the electronic properties, for self-diffusion, and the influence of high pressure on metallic nano-structures will be developed. Our study will include solid and liquid metals such as gallium, sodium, lead, tin, and selected alloys (Ga-In, Ga-Sn, Na-K), subjected to high pressures and embedded into mesoporous matrices in interaction with surfaces in a variety of nano-structures. The main experimental techniques will be high-field Nuclear Magnetic Resonance (NMR), combined with new groundbreaking high-sensitivity Giga-Pascal pressure cells, i. e., up to 200 kbar or 20 GPa. Complementary magnetometry and ultrasonic spectroscopy will be employed.