Search for dissertations about: "Quantum transport modeling"

Showing result 1 - 5 of 12 swedish dissertations containing the words Quantum transport modeling.

  2. 1. Electronic structure and transport in exotic nanostructures

    Author : Athanasios Tsintzis; NanoLund: Centre for Nanoscience; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Nanostructures; Electronic structure; Quantum transport; Nanowires; Quantum dots; Superconductivity; Majorana bound states; Topological insulators; Fysicumarkivet A:2023:Tsintzis;

    Abstract : This thesis explores the physics of nanostructures involving nanowires, quantum dots, superconductors, and topological insulators. These systems serve as excellent platforms for fundamental physics studies and quantum technology applications. READ MORE

  4. 2. Theoretical Modeling of Intra- and Inter-molecular Charge Transport

    Author : Lili Lin; Yi Luo; Alessandro Troisi; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; charge transport; molecular junction; organic molecular materials; Green s function; first-principles simulation; SRA - Transport; SRA - Transport;

    Abstract : This thesis focuses on theoretical study of charge transportproperties in molecular systems. The understanding of the transportprocess and mechanism in molecular systems is essential forthe design of new functional molecular materials and molecularelectronic devices. READ MORE

  5. 3. Nanospintronics with Molecular Magnets - Tunneling and Spin-Electric Coupling

    Author : Javier Francisco Nossa Márquez; Fasta tillståndets fysik; []
    Keywords : Molecular magnets; spin exchange; spin-orbit interaction; magnetic anisotropy; spin frustration; spin chirality; spin-electric control; quantum transport; Coulomb blockade; density functional theory; quantum master equation.;

    Abstract : This dissertation investigates theoretically electric control of the magnetic properties of molecular magnets. Two classes of magnetic molecules are considered. The first class consists of molecules that are spin frustrated. READ MORE

  6. 4. Quantitative Modeling of Gain in Quantum Cascade Lasers under Operational Intensities

    Author : David Winge; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; non-linear response; quantum cascade lasers; modelling; Non-equilibrium Green s functions; Gain clamping; Fysicumarkivet A:2016:Winge; kvantkaskadlaser; terahertz; infrarött; Halvledarfysik; spektroskopi; simulering;

    Abstract : This thesis adresses modeling of quantum cascade lasers using non-equilibrium Green’s functions. Focus lies on the quantitative modeling of the gain when the systems are exposed to strong laser fields, as under realistic opertional conditions. READ MORE

  7. 5. Electrical and Optical Properties of AlGaAs/GaAs Aperiodic Superlattices and Resonant Tunneling Diodes. Theory, Design and Applications

    Author : Simon Mang Cao; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; exciton-assisted transport; miniband; high-speed quantum electronics; optical properties; ultrafast optoelectronics; field-induced transport; irregular superlattices; nanometer-scale heterostructures; laser diodes; resonant tunneling;

    Abstract : The objective of the work presented in this thesis is to study quantum transport and optical properties of aperiodic superlattices and resonant tunneling diodes using III-V semiconductor heterostructures grown by molecular beam epitaxy. The study follows a procedure of theoretical modeling, computer-aided design and simulation, sample growth, and measurements. READ MORE