Sökning: "Solid State Physics"

Visar resultat 16 - 20 av 42 uppsatser innehållade orden Solid State Physics.

1. 16. Simulation of Paperboard with the EBT Paperboard Model and Cohesive Zones

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära; Lunds universitet/Institutionen för byggvetenskaper

   Författare :Maria Anghel; [2019]
   Nyckelord :FEM; FEA; computer simulation; solid mechanics; paperboard; Technology and Engineering;

   Sammanfattning : Previous numerical investigations have simulated the delamination of paperboard using various mechanical and cohesive models. This has given satisfactory agreement between the simulation results and experimental data when comparing force-depth curves during creasing and moment-angle curves during folding. LÄS MER

3. 17. Real-time stability and dynamics of vortices in quasi-two-dimensional self-bound two-component Bose-Einstein condensate

   Master-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Författare :Philipp Stürmer; [2019]
   Nyckelord :Bose-Einstein condensate; bosons; self-bound; cold atom gases; vortex; Physics and Astronomy;

   Sammanfattning : This thesis presents a numerical study of the beyond mean field extended Gross-Pitaevskii equation for a two-component self-bound Bose-Einstein condensate, supplemented by analytical work. We extend the quasi-two-dimensional system's mean field particle-particle contact interaction by quantum fluctuations (LHY-correction). LÄS MER

4. 18. All solid state single-shot Dispersion scan (D-Scan) for ultrashort laser pulses

   Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Författare :Shekhar Jadhav; [2019]
   Nyckelord :Dispersion scan; d-scan; Single shot d-scan; Si-scan; Physics and Astronomy;

   Sammanfattning : Ultrashort laser pulses play an important role in many applications in science and technology, from attosecond science to time resolved spectroscopy and material processing. For applications of ultrashort laser pulses, it requires a complete characterization of the electric field of the pulse, which includes both phase and amplitude of the electric field. LÄS MER

5. 19. Combining the GW Approximation with the Hubbard I Approximation for strongly correlated materials

   Magister-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Författare :Torsten Strunck; [2019]
   Nyckelord :GWA; GW Approximation; HIA; Hubbard I Approximation; Hubbard-I Approximation; Hubbard model; DMFT; Dynamical Mean Field Theory; strongly correlated materials; electron correlations; solid state physics; Physics and Astronomy;

   Sammanfattning : In this thesis, the GW approximation (GWA, Green's function G times screened interaction W) and the Hubbard I approximation (HIA) are combined in a non-self-consistent one-shot calculation to determine the electronic structure of a one-dimensional strongly-correlated model. The scheme was chosen to incorporate both screening effects through the GWA and strong on-site correlations through the atomic HIA. LÄS MER

7. 20. Ab initio simulations of topological phase transitions in Dirac semimetal Cd3As2 doped with Zn and Mn impurities

   Master-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

   Författare :Andrea Rancati; [2019]
   Nyckelord :Topological materials; Dirac semimetals; Weyl semimetals; ab initio simulation; first-principles;

   Sammanfattning : In this work we exploit the unique characteristics of a Dirac semimetal material to be symmetry-protected, to investigate dierent topological phase transitions provided by chemical dopings, focusing in particular on the electronic, magnetic and topological properties of the doped systems, studied by the mean of rst-principles methods based on density functional theory (DFT) approach. In particular these doped systems, besides being of interest for investigating the role of topology in solid state physics, could have a great potential for practical application since the dierent topological phases that come along with the chemical dopings allow one to exploit the unique properties of topological materials. LÄS MER