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

美国-保加利亚合作研究：铁磁金属的多体理论

• 批准号: 9876873
• 负责人: Kevin Bedell
• 金额: $ 2.3万
• 依托单位: Boston College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9876873&HistoricalAwards=false
• 关键词: U.S.; Bulgaria; Cooperative; Research; Many

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.***

INT-9876873贝德尔美国-保加利亚合作研究奖是对铁磁金属多体理论的研究。 主要研究人员是凯文·S。波士顿学院的比德尔博士和保加利亚方面的Naoum I博士。Karchev和Krastan B.布拉戈耶夫 电子关联的多体物理学决定了许多科学和技术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，从而确定材料的物理性质。 具体来说，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。 比德尔博士发展了描述金属的现象学技术;卡尔切夫博士和布拉戈耶夫博士在金属的微观基础方面有专长。 这项合作将有助于更深入地了解金属中的弱铁磁性。 理论工具的融合将应用于不同的模型，并将阐明真实的材料的物理学。 研究人员将专注于Ni3Al，MnSi和ZrZn2.这项物理研究实现了汇集美国和保加利亚领先专家的计划目标，在平等，互惠和互利的基础上，在具有强烈共同利益和能力的领域联合收割机互补努力和能力。