| Areas of Specialisation: Statistical Mechanics of Disordered and Complex Systems; i.e., statistical physics analytic, and Monte Carlo modelling and simulation, methods applied to the study of diverse disordered systems. E.g., material fracture (from crack nucleation and propagation to breakdown of materials), self-organised surface nanostructure morphology and propagation induced by ion-bombardment, molecular chirality transfer and matching (with applications to facial/object/structure recognition in databases), biophysical systems (e.g., protein folding, drug design and discovery). Same methods combined with graph theory to study the networks of diverse complex systems.
Selected Publications, (click the paper title link) for details: | 1. O. E. Oyewande, Y. Moreno, F. Kun, R. C. Hidalgo, and H. J. Herrmann (2003). Time evolution of damage under variable ranges of load transfer. Physical Review E 68, 026116. | 2. O. E. Oyewande, A. K. Hartmann, R. Kree (2005). Propagation of ripples in Monte Carlo models of sputter-induced surface morphology. Physical Review B 71, 195405. | 3. O. E. Oyewande, R. Kree, and A. K. Hartmann (2006). Morphological regions and oblique-incidence dot formation in a model of surface sputtering. Physical Review B 73, 115434. | 4. O. E. Oyewande, R. Kree, and A. K. Hartmann (2007). Numerical analysis of quantum dots on off-normal incidence ion sputtered surfaces. Physical Review B 75, 155325. | 5. O. E. Oyewande, M. P. Neal, and R. Low (2009). The Hausdorff chirality measure and a proposed Hausdorff structure measure. Molecular Physics 107, 281. | 6. O. E. Oyewande and A. Akinpelu (2018). An ion-beam surface sputtering approach to the quest for lead-free metal halide perovskite for solar cells. Nuclear Instruments and Methods in Physics Research Section B 434, 102. |
Quantum Theory; e.g., study and development of exact analytical or perturbative and variational methods of solving quantum dynamical equations of motion, using linear algebraic or wave mechanics representations, and calculating the physical properties of matter; use of computational quantum chemistry softwares for the discovery of novel materials (e.g., in search of materials for cheaper, more durable and efficient solar panels for electricity generation); study of the theoretical fundamentals of the hybridised methods (perturbative, variational, density functionals, Kohn-Sham schemes, etc.) applied in the softwares relative to above interest for improvement; quantum computing problems.
Selected Publications, (click the paper title link) for details: | 9. I. B. Ogunniranye, T. Atsue, and O. E. Oyewande (2021). Structural and optoelectronic behavior of the copper-doped Cs2AgInCl6 double perovskite: A density functional theory investigation. Physical Review B 103, 024102. | 10. T. Atsue, I. B. Ogunniranye, and O. E. Oyewande (2021). Investigation of material properties of halide mixed lead - free double perovskite for optoelectronic applications using first-principles study. Materials Science in Semiconductor Processing 133, 105963. | 11. T. Atsue and O. E. Oyewande (2024). First-principles study of the structural, mechanical, dynamical, and transport properties of Cs2NaInX6[X = Br,I] for thermoelectric applications. Current Applied Physics 57, 70. | 12. T. Atsue and O. E. Oyewande (2024). Investigating the CsAuX3[X=Cl, Br, I] perovskitee materials properties responsible for photovoltaic applications: A first-principles study. Computational Materials Science 236, 112881. |
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