Essays about: "heterostructure"

Showing result 11 - 15 of 24 essays containing the word heterostructure.

  1. 11. Electron Assisted Growth of h-BN on Gr/Ir(111)

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Virginia Boix De La Cruz; [2018]
    Keywords : Two-dimension materials; 2D; Graphene; hexagonal Boron Nitride; Growth; CVD; STM; XPS; Physics and Astronomy;

    Abstract : Stacked heterostructures of two-dimensional (2D) materials are emerging as promising building blocks for a wide range of applications. These devices, which range from tunneling transistors to light-emitting diodes, use the properties of 2D materials that are not accessible by their bulk counterparts. READ MORE

  3. 12. Electrical characterization of strained InP-Ga(x)In(1-x)As core-shell nanowires

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

    Author : Lorenz Frevel; [2016]
    Keywords : nanowire; strain; piezoelectric effect; indium phosphide; InP; gallium indium arsenide; GaInAs; InGaAs; core-shell; radial heterostructure; Physics and Astronomy;

    Abstract : This project report attempts to measure the piezoelectric effect in strained core-shell nanowires. The core material is wurtzite indium phosphide (InP) and the shell material wurtzite gallium indium arsenide (Ga(x)In(1-x)As). READ MORE

  4. 13. A Study of Atomic Diffusion from First Principles Theory

    University essay from Uppsala universitet/Materialteori

    Author : Raquel Esteban Puyuelo; [2016]
    Keywords : ;

    Abstract : In this work Density Functional Theory and the Nudged Elastic Band method are used to calculate energy barriers to study atomic diffusion. Diffusion is one of the processes that leads to non ideal experimental conditions such as defects or not sharp enough interfaces. READ MORE

  5. 14. Effects of geometry on electronstates in semiconductor quantumpoint contacts

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Rasmus Hytter; [2016]
    Keywords : ;

    Abstract : Recent preliminary experiments appear to show that using the electron-electron interaction as a way to filter electrons through a quantum point contact (QPC) according to spin might be possible. The same experiments also show that the geometry of the constriction has an effect on the filtering. READ MORE

  6. 15. Quantized Transmission in an Asymmetrically Biased Quantum Point Contact

    University essay from Linköpings universitet/Teoretisk Fysik

    Author : Erik Johansson; [2016]
    Keywords : ;

    Abstract : In this project work we have studied how a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs semiconductor heterostructure can be locally confined down to a narrow bottleneck constriction called a quantum point contact (QPC) and form an artificial quantum wire using a split-gate technique by application of negative bias voltages. The electron transport through the QPC and how asymmetric loading of bias voltages affects the nature of quantized conductance were studied. READ MORE