U.S.-Austria Cooperative Research on Narrow Bandgap IV-VI Semiconductor Microstructures

该奖项将支持对该主题的合作研究 半导体微结构。美国调查人员在 布朗大学的阿尔托·努尔米科博士和菲利普·斯泰尔斯博士， 和波斯顿大学的贝内特·戈德堡博士 奥地利 合作者是冈瑟·鲍尔教授，物理研究所， 奥地利林茨大学。 该项目的目标是 探索基于窄的半导体微结构， 带隙IV-VI化合物。 一系列复杂的实验 研究提出，重点是低维 量子化磁场中的电子现象。 具体而言，组成和掺杂超晶格，异质- 第四列和第四列的结和其他微结构 六个元件将生长，制造和研究的光学 和运输实验探测器。 对PbTe的强调- 基于的系统是由于固有的高载流子迁移率， 易于掺杂，且介电常数大， 其它材料 这项研究将集中于确定 当库仑定律 载流子之间的能量与 动能。他们还将研究减少 这种互动的维度方面，通过创建 组成和掺杂异质结， 二维的载体。 实验工具是 应用的是磁传输、带间和带内 磁光和瞬态光学探针。 样品将 在奥地利种植，在波士顿大学模仿， 布朗大学。该项目将受益于 美国和奥地利调查人员的互补专业知识 以及他们过去成功合作的历史。

This award will support collaborative research on the topic of semiconductor microstructures. The US investigators are Dr. Arto Nurmikko and Dr.Phillip Stiles, Brown University, and Dr. Bennet Goldberg, Boston University. The Austrian collaborator is Professor Gunther Bauer, Institut fur Physik, University of Linz, Austria. The goal of the project is to explore novel semiconductor microstructures, based on Narrow bandgap IV-VI compounds. A range of sophisticated experimental studies are proposed, with emphasis on lower dimensional electronic phenomena in quantizing magnetic fields. Specifically, compositional and doping superlattices, hetero- junctions and other microstructures of column four and column six elements will be grown, fabricated and studied by optical and transport experimental probes. The emphasis on PbTe- based systems is due to the inherent high carrier mobilities, ease of doping, and large dielectric constant unavailable in other materials. The study will concentrate on determining the unusual many body properties of systems when the Coulomb energy between carriers is of the same order of magnitude as the kinetic energy. They will also examine the reduced dimensional aspects of this interaction, by creating compositional and doping heterojunctions which confine the carriers in two dimensions. The experimental tools to be applied are magneto-transport, interband and intraband magneto-optics, and transient optical probes. Samples will be grown in Austria and patterned at Boston University and Brown University. The project will benefit from the complementary expertise of the US and Austrian investigators and their past history of successful collaboration.