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

这是美国-保加利亚合作研究奖，用于研究铁磁金属的多体理论。主要研究人员是波士顿学院的凯文·s·比德尔（Kevin S. Bedell），而保加利亚方面的研究人员是凯文·s·比德尔博士。Naoum I. Karchev和krstan B. Blagoev。电子相关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。在这项提案中，研究人员将研究重整化电子如何与它们自己的集体激发反应，从而决定材料的物理性质。具体来说，他们将研究这些相互作用在铁磁-顺磁相变附近的金属。参与者将受益于他们互补但独特的技能的结合和分享。比德尔博士开发了描述金属的现象学技术；Drs。卡尔切夫和布拉戈耶夫在金属微观基础方面有专长。这次合作将支持对金属弱铁磁性的更深入理解。理论工具的合并将应用于不同的模型，并将阐明实际材料的物理学。研究人员将重点研究Ni3Al、MnSi和ZrZn2。这项物理学研究实现了将美国和保加利亚的顶尖专家聚集在一起的计划目标，在平等、互惠和互利的基础上，在共同感兴趣和能力强的领域结合互补的努力和能力

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.***