【摘 要】
：
从原子尺度对半导体材料的电子能带结构和载流子动力学进行人工裁剪和调控,对于设计新型光电子功能器件和提升现有半导体光电子器件性能,具有十分重要的指导意义.我们前期研
【机 构】
：
北京大学物理学院;北京量子物质科学协同创新中心,北京100871DepartmentofNuclearScienceandEngineeringandDepartmentofMaterialsScie
论文部分内容阅读
从原子尺度对半导体材料的电子能带结构和载流子动力学进行人工裁剪和调控,对于设计新型光电子功能器件和提升现有半导体光电子器件性能,具有十分重要的指导意义.我们前期研究工作表明,由于微/ 纳米尺度材料能够承载比体材料大得多的弹性应变[1],可以从原子尺度连续和可逆的调节半导体的晶格参数,应变效应被放大[2],应变梯度发挥作用[3].弹性应变工程可作为一种用于人为调控半导体材料电子能带结构和载流子动力学行为的重要手段.但是,对于非均匀应变场的应变梯度对半导体激子和载流子动力学影响的研究,尤其是实验上的研究是一个巨大的挑战.
其他文献
To meet the urgent unmet needs in advanced dosage forms of increasing biologic medicines,we developed two platform technologies for formulating proteins and
The spin dependent transport across ferromagnet/semiconductor interfaces depends critically on their structure and electronic properties.Interracial reactio
It is well known that MOSFET on SiGe-on-insulator(SGOI)substrate has advantages of high carrier mobility and suppression of parasitic capacitance and leakag
In this talk,processing challenges of CMOS integration of FinFETs with all-last gate stacks and solutions by using novel materials are presented.It is found tha
Since germanium(Ge)has a quasi-direct band gap of 0.8 eV,it is a promising material for fabricating on-chip optoelectronic devices.Although Ge based individ
It has been generallyrecognized that chromophore aggregation quenches fluorescence process.We have observed an opposite phenomenon termed"aggregation-induced em
Development of polymeric materials with advanced properties is of great academic values and has high-tech implications.Polymers loaded with fluorophores are exc
The extracellular matrix (ECM) mimicking properties of electrospun polymer nanofibers afford their use as an ideal scaffold material for differentiation of
具有化学识别能力的亚纳米分辨识别与成像是物理、化学、生物、材料等领域长期追求的目标和梦想.最近，我们利用自主研发的低温超高真空扫描隧道显微镜与针尖增强拉曼散射
螺杆真空泵工作过程中，转子在力载荷和热载荷的共同作用下发生形变。若转子与泵腔冷配合间隙过小，不足以补偿转子形变，会引起机器卡死现象；相反若转子与泵腔冷配合间隙过大，运