无机半导体波色爱因斯坦凝聚的研究

项目名称： 无机半导体波色爱因斯坦凝聚的研究

项目编号： No.21201075

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 黄科科

作者单位： 吉林大学

项目金额： 25万元

中文摘要： 本项目基于过渡金属锰氧化物三重价态及原子尺度p-n结等前期研究工作，以歧化反应为主要合成手段，结合分子束外延技术，以Ⅲ-Ⅴ﹑Ⅱ-Ⅳ与Ⅲ-Ⅳ-Ⅴ族无机半导体材料为研究对象，开展对其电子输运、成对、波色爱因斯坦凝聚的研究。元素混合价态的控制是固体化学领域重要的调控手段，直接影响着固体中电子、自旋、晶格之间的相互作用。另外，利用无机半导体电子结构丰富多变设计合成新概念激子晶体。该激子晶体是稳定的Mott-Hubbard绝缘体，其在外场下以激子为媒介生成稳定的电子对，并发生波色爱因斯坦凝聚，从而实现室温及室温以上超导。本项目的意义在于通过化学等手段对无机半导体材料进行原子层面调控，构筑稳定激子结构，对于探索在更高温度或室温下实现超导开拓出一条独辟蹊径的道路。

中文关键词： 无机半导体；波色爱因斯坦凝聚；分子束外延；超导；

英文摘要： This project is based on the previous work about the manganese oxide with three oxidation states and the atomic p-n junction. Main attention will be paid on the Ⅲ-Ⅴ, Ⅱ-Ⅳand Ⅲ-Ⅳ-Ⅴgroup inorganic semiconductors and their electrical transport, pairing and Bose-Einstein condensation properties. The project will be performed by the method of disproportionation reaction, combined with the Molecular Beam Epitaxy (MBE) technique. The control of the mixed valence states is very important in the field of the solid chemistry and can affect the interaction of electron, spin and lattice. Furthermore, new concept exciton crystal will be designed based on the complicated arrangement of the electron in inorganic semiconductor. The exciton crystal are stable Mott-Hubbard insulator and can form Bose-Einstein condensation through the stable electron pairs which are made of excitons in the applied field. We make it possible to study the superconductivity at or above room temperature. The importance of the project is that we modulate the electronic states in inorganic semiconductor materials and construct the stable exciton structure through chemical and physical approaches. We hope to explore a direct way to realize the superconductivity at or above room temperature.

英文关键词： inorganic semiconductor；Bose-Einstein Condensation；Molecular Beam Epitaxy；Superconductivity；