U.S.-Czech Republic Materials Research on Novel Magnetic Semiconductors Based on Antimony Telluride [Sb2Te3]

美国-捷克共和国基于碲化锑[Sb2Te3]的新型磁性半导体材料研究

• 批准号: 0201114
• 负责人: Ctirad Uher
• 金额: $ 6.94万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-15 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0201114&HistoricalAwards=false
• 关键词: U.S.; Czech; Republic; Materials; Research

This U.S.-Czech materials research project involving Ctirad Uher of the University of Michigan and his Czech partner, Petr Lostak at the University of Pardubice, will build upon their recently reported observation of long-range ferromagnetism in a class of ansiotropic semiconductors based on antimony telluride [Sb2Te3], doped with a minute amount of vanadium. They now plan to study the effect of transition metal ions incorporated in the crystal lattice of Sb2Te3 single crystals with the goal of identifying dopants that enhance the Curie temperature beyond the vanadium-doped value (~25K). Specifically, the researchers will examine the role of chromium, manganese, iron, nickel and cobalt. The collaborative effort benefits from the Michigan group's expertise in transport and magnetic properties of tetradymite-type structure semiconductors and the Czech partners' strengths in growth of single crystals and characterization of these materials. Results in this area of diluted magnetic semiconductors may lead to applications in information technology given the promising dual features of charge carrier transport and spin manipulation in thin films. This collaborative project in condensed matter physics fulfills the program objective of advancing scientific knowledge by enabling experts in the United States and Central Europe to combine complementary talents and share research resources in areas of strong mutual interest and competence.

This U.S.-Czech materials research project involving Ctirad Uher of the University of Michigan and his Czech partner, Petr Lostak at the University of Pardubice, will build upon their recently reported observation of long-range ferromagnetism in a class of ansiotropic semiconductors based on antimony telluride [Sb2Te3], doped with a minute amount of vanadium. 他们现在计划研究掺入SB2TE3单晶晶体晶格中的过渡金属离子的作用，其目的是鉴定掺杂剂，从而增强了咖喱温度超出钒掺杂值（〜25K）。 具体而言，研究人员将研究铬，锰，铁，镍和钴的作用。 协作努力受益于密歇根集团在四酰胺型结构半导体的运输和磁性特性方面的专业知识以及捷克伙伴在单晶生长和这些材料表征方面的优势。 鉴于电荷载体传输的有前途的双重特征和薄膜中的旋转操作的有前途的双重特征，在稀释的磁性半导体区域中的结果可能导致信息技术的应用。 这个凝结物理学的合作项目实现了通过使美国和中欧的专家能够结合互补才能并在浓厚的共同兴趣和能力领域中共享研究资源来促进科学知识的计划目标。