"U.S.-Czechoslovakia Research on the Theory of Magnetoconductivity of a Two-Dimensional Electron Gas in a Periodic Potential"

这次美捷联合行动的主要目标 艾伦·麦克唐纳博士之间的合作科学计划 印第安纳州大学的帕维尔·斯特雷达博士 捷克斯洛伐克科学院物理研究所 科学是人工研究磁导性 结构化二维电子系统和相位 连贯性 当多个朗道能级 在费米能量下形成一个轨迹网络 为了理解边缘的作用， 在较弱的磁场下的输运性质 领域的 研究人员打算研究可能的非- 在高电流密度下可能出现的线性效应; 什么可测量的物理量与 在量子情况下的整数量子数， 能隙出现在填充因子处， 整数s和o;以及 开闭轨线的半经典图象 和量子能谱。 研究人员的 预计这些努力将使人们对交通运输有更深入的了解 在磁场中的性质，并发展了一个理论 基于传输矩阵方法。 这个凝聚态理论的项目实现了 通过以下方式提高科学知识的计划目标 使美国的顶尖专家和 东欧将联合收割机互补人才， 共同感兴趣领域的研究资源 和能力。

The primary objective of this US-Czechoslovakia Cooperative Science Program between Dr. Allan MacDonald of Indiana University and Dr. Pavel Streda of the Physics Institute of the Czechoslovakian Academy of Sciences is to study magnetoconductivity of artificially structured two-dimensional electron systems and phase coherence. The case when more than one Landau level forms a trajectory network at the Fermi energy will be considered in order to understand the role of edge states in the transport properties at weaker magnetic fields. The researchers intend to study possible non- linear effects that can appear at high current densities; what measurable physical quantity is connected with the integer quantum number s in the quantum case where energy gaps appear at filling factors determined by integers s and o; and the relationship between the semiclassical picture of open and closed trajectories and the quantum energy spectrum. The researchers' efforts are expected to produce insight into transport properties in a magnetic field and to develop a theory based on the transmission matrix approach. This project in condensed matter theory fulfills the program objective of advancing scientific knowledge by enabling leading experts in the United States and Eastern Europe to combine complementary talents and pool research resources in areas of strong mutual interest and competence.