Intrinsic Interaction Between Superconductivity and Magnetism in Quaternary and Pseudoquaternary Borocarbides

这一个人研究人员奖将向一位资深教授提供支持，以表彰他与乌克兰领先科学家合作，调查超导和磁性这两个“敌对”状态之间的相互作用。选择了稀土-镍-碳化硼系列化合物作为研究对象，这些化合物表现出丰富的相关现象。重要的长度刻度可以通过引入点缺陷来改变。这将通过化学取代和高能电子辐射来完成，以便将与物理无序有关的影响与与化学“压力”有关的影响分开。这项研究将讨论超导和磁性共存区域中对破裂机制的作用，该区域奇异电子态的性质，以及这些金属间化合物中正常态输运的反常现象。这些结果有望对理解超导和磁性之间的相互作用具有普遍的适用性，远远超出所选择的特定材料的范围。学生将接受培训，为他们在工业、学术界或政府部门的职业生涯做好准备。与来自另一个国家的顶尖科学家的密切接触和互动将为这些学生提供新的科学和文化视角。这一个人研究员奖将支持首席研究员和乌克兰顶尖科学家的共同努力，调查“敌对”物理状态之间的复杂相互作用，即磁性和超导。这些研究选择了一系列化合物，稀土-镍-碳化硼，它显示了与这两种状态相关的不寻常的各种现象。我们将研究由化学取代和高能电子辐照引入的无序对相互作用的影响。超导和磁性之间的相互作用是固体物理学中的一个基本问题，这项研究的结果有望使我们更好地理解这种相互作用，这种相互作用将适用于所选材料之外。学生将有机会与国际领先的科学家合作，同时学习最先进的技术和实验技能。

This individual investigator award will provide support to a senior professor for a collaboration with leading scientists in Ukraine to investigate the interplay between two "hostile" states, superconductivity and magnetism. The rare-earth-nickel-borocarbide family of compounds which exhibit a wealth of related phenomena have been chosen for the study. Important length scales can be changed by introduction of point defects. This will be done by both chemical substitution and irradiation with high energy electrons in order to separate the effects related to physical disorder from those related to chemical "pressure". The research will address the role of pair breaking mechanisms in the region of coexistence of superconductivity and magnetism, the nature of exotic electronic states in this region and the anomalies in normal state transport in these intermetallics. The results are expected to be of general applicability to the understanding of the interplay between superconductivity and magnetism, valid well beyond the particular material chosen. Students will receive training that will prepare them for careers in industry, academia or government. The close contact and interaction with leading scientists from another country will provide new perspectives on science and culture for these students.This individual investigator award will provide support to a joint effort by the principle investigator and leading scientists in Ukraine for an investigation into the intricate interplay between "hostile" physical states, namely magnetism and superconductivity. A family of compounds, rare-earth-nickel-borocarbides, that shows an unusual variety of phenomena related to these two states has been chosen for these studies. The effects of disorder, introduced both by chemical substitution and irradiation with high energy electrons, on the interplay will be studied. The interplay between superconductivity and magnetism is a fundamental problem in solid state physics, and the results of this investigation are expected to lead to a much better understanding of this interplay that will be applicable beyond the chosen material. Students will have the opportunity to collaborate with leading international scientists while learning state-of-the art technology and experimental skills.