Theoretical and Applied Physics

 

This collection belongs to the Masters graduands of Theoretical and Applied Physics department in AUST . They are rigorous research work in different areas under this field of study, which can be applied and used to solve identified Scientific problems.

Recent Submissions

  • Noise-Enhanced Directed Transport of Cold Atoms 

    Odeke, Bonaventure Andrew (2021-03-14)
    The possibility of enhancing directed transport for a driven quantum particle in the presence of noise is investigated. Specifically, we deal with cold atoms trapped in an asymmetric optical lattice potential (ratchet ...

  • Finite Pulse Ratchet Effect of Cold Atoms 

    Chung, Gyang Davou (2021-03-23)
    The thesis presents the modelling and simulation of the rachet effect created by a spatio temporal asymmetry potential. The potential is a coupled spatial asymmetry sin wave and a rectangular pulse train. The effective ...

  • Graphene-Hexagonal Boron Nitride Work Function Response to Uniform Planar Deformations: An ab initio DFT Study 

    Jesutofunmi, Ayo Fajemisin (2021-04-23)
    A two-dimensional hybrid material with graphene and hexagonal boron (h-BN) domain is considered as viable material for future generations of flexible electronic devices due to the tunable band gap, excellent mechanical and ...

  • Ratchet Current Landscape at Quantum Resonance 

    Kabir, Salihu Suraj (2020-12-14)
    The ratchet effect is the rectified motion of atoms using an unbiased driving force. By ‘’unbiased’’ we mean to say that the time-average is equal to zero. This can be accomplished experimentally using cold atoms in a ...

  • Effect of Disorder on Spin Transport in Topological Non-Trivial Magnetic Textures 

    Osuala, Cynthia Ihuoma (2019-06)
    An effect that is observed when an electron passes through a non-collinear magnetic textures such as skyrmion, the electron gets deviated as a result of the fictitious magnetic field generated by the skyrmion giving rise to ...

  • Biomechanics of Surface Runoff and Soil Water Percolation 

    James, Makol Madut Deng (2019-06-23)
    In this study, the complex interaction of surface runoff with the biomechanics of soil water transport and heat transfer rate is theoretically investigated using mathematical model that rely on the two phase flows of an ...

  • Structural, Electronic and Optical Properties of Cu 2 Sns 3 Solar Absorber: A First-Principle Density Functional Theory Investigation 

    Isyaku, Abdullahi Odoguje (2019-06-23)
    The development of inexpensive, non-toxic, high efficiency and earth-abundant solar absorbers is critical for terawatt scale implementation of photovoltaics. Cu 2 SnS 3 is a promising earth abundant absorber material that ...

  • Pulsed Lasers in Lidar Application: Models for Optimizing Wind Turbine Performance 

    Iroh, Michael Chijioke (2019-06-22)
    Since the appearance of the first wind turbines at the end of the nineteenth century, wind energy has been considered to be a renewable energy source for not just developed countries but also developing countries as well. ...

  • Theoretical Study of Current-Induced Dynamics of an Antiferromagnetic Skyrmionium 

    Abayomi, Samuel Obadero (2019-06-22)
    In this thesis, we present a theoretical study on the current-induced nucleation and propagation of antiferromagnetic skyrmionium. A skyrmionium, also known as 2π-skyrmion, is a vortex-like magnetic structure characterized ...

  • Topological Antiferromagnetic Magnons 

    Jamiu, Adam Ajibola (2019-07-12)
    We have studied a model for a non-collinear but coplanar antiferromagnetic spin texture on a two dimensional kagome lattice structure in the presence of Dzyaloshinskii-Moriya Interaction (DMI). We observed some interesting ...

  • Tight Binding Descriptions of Graphene and Its Derivatives 

    Muhammad, Maikudi Isah (2017-12-20)
    Graphene is an effectively two dimensional form of carbon atoms arranged in honeycomb lattice. Due to its lightweight, high electron mobility and other special electronic properties it is considered both an academically ...

  • Combination and Tracking Control of Chaotic Systems 

    Abdulgaffar, ABdurrazaq (2016-06-20)
    Combination-control of two or more systems which may have important application in Josephson junction ratchet array, and other physical systems has not been explored. Most of the theoretical framework is on combination ...

  • First Principle Study: Absorption of Molecular Hydrogen Sulphide on Gold Clusters 

    Igunbor, Emmanuel (2009-11-13)
    We present theoretical results of the study of H 2 S adsorption on gold cluster Au n (n = 1, 5) using density functional theory with Perdew-Burke-Ernzerhof (PBE) exchange-correlation energy functional. Minimum energy ...

  • Ab Initio Density Study of N and O Coadsorption on Pt(100) and Pt(111) 

    Obodo, Tobechukwu Joshua (2009-11-13)
    We have used ab initio density functional theory to study the coadsorption of N and O on Pt(100) and Pt(111) surfaces. Our calculations show that on Pt(100) the most favourable site is the hollow site for N and the bridge ...

  • Fundamentals of Laser Dynamics 

    Sanni, Dahiru Muhammad (2013-05-13)
    The thesis presents the modeling and simulation of three types of lasers namely; Semicondoctor laser, Solid state laser and CO 2 laser. The rate equations were derived and simulated to examine the dynamic behaviour of the ...

  • The Design of an On-Chip Silicon Photonic Diode 

    Okikiola, Olaniyan (2013-05-13)
    This work presents numerical calculation of electromagnetic waves in unidirectional on-chip silicon optical diodes. An original optical diode, designed by Wang et. al. [Opt. Express. 19, 26948-26955 (2011)], is based on ...

  • Simulation of Carbon Nanotube Growth 

    Ogunbunmi, Michael Olawale (2013-05-13)
    The basic understanding of the underlying techniques of growing Carbon Nanotubes (CNTs) with a specific chirality is still obscure and needs to be understood so as to properly harness its potentials. Using both Classical ...

  • Electro-Magnetic Duality, Magnetic monopoles and Topological Insulators 

    Nounahon, Mahougnon Philippe (2013-05-13)
    The Maxwell equations of electrodynamics acquire an additional symmetry if one assumes the existence of hypothetical particles-magnetic monopoles, carrying a magnetic charge. The additional internal symmetry is the ...

  • Femtosecond Laser Surface Texturing of Materials for Various Applications 

    Nforneh, Benjamen (2013-05-13)
    Femtosecond lasers represent an electromagnetic field with field intensities approaching and even exceeding atomic binding field. When irradiated on a target, the material responses change from linear to nonlinear within ...

  • Nonlinear Effect in-flow in Porous Duct 

    Hafeez, Yusuf Hafeez (2013-05-13)
    In general, it is assumed in some non viscous flows that the flow velocity is constant at a cross-section. In this thesis, If we impose more realistic boundary conditions by, for example, introducing viscosity,and suction ...

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