U.S.-Bulgaria Cooperative Research: Many Body Theory of Ferromagnetic Metals

这个美国-保加利亚合作研究奖是为了表彰对铁磁性金属多体理论的研究。主要调查人员是波士顿学院的凯文·S·比德尔，保加利亚方面是纳乌姆·I·卡奇耶夫博士和克拉斯坦·B·布拉戈耶夫博士。电子关联的多体物理决定了许多对科学和技术最感兴趣的材料的磁性。在这个提议中，研究人员将研究重整化的电子如何与它们自己的集体激发反应来决定材料的物理性质。具体地说，他们将研究铁磁-顺磁相变附近金属中的这些相互作用。参与者将受益于结合和分享他们互补但独特的技能。比德尔博士开发了描述金属的现象学技术；Karchev博士和Blagoev博士在金属的微观基础方面拥有专业知识。这一合作将有助于加深对金属中弱铁磁性的理解。理论工具的融合将应用于不同的模型，并将阐明真实材料的物理。研究人员将把重点放在Ni3Al、MnSi和ZZZ2上。这项物理研究实现了将美国和保加利亚的顶尖专家聚集在一起，在平等互利和互惠互利的基础上，在共同利益和能力强的领域结合互补努力和能力的计划目标。*

INT-9876873BedellThis U.S.-Bulgaria Cooperative Research award is for research on the Many Body Theory of Ferromagnetic Metals. The principal investigators are Kevin S. Bedell of Boston College, and, for the Bulgarian side, Drs. Naoum I. Karchev and Krastan B. Blagoev. The many body physics of electron correlations determine the magnetic properties of many materials of prime interest to science and technology. In this proposal, the researchers will study how renormalized electrons react with their own collective excitations determining the physical properties of the material. Specifically, they will study these interactions in metals in the neighborhood of the ferromagnetic-paramagnetic phase transition. The participants will benefit from combining and sharing their complementary but unique skills. Dr. Bedell has developed phenomenological techniques for the descriptions of metals; Drs. Karchev and Blagoev have expertise in the microscopic foundations of metals. This collaboration will support the development of a deeper understanding of weak ferromagnetism in metals. The amalgamation of theoretical tools will be applied to different models and will shed light on the physics of real materials. The researchers will focus on Ni3Al, MnSi, and ZrZn2.This research in physics fulfills the program objectives of bringing together leading experts in the U.S. and Bulgaria to combine complementary efforts and capabilities in areas of strong mutual interest and competence on the basis of equality, reciprocity, and mutuality of benefit.***