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8: Visualization of degenerate states in infinite (a) triangular and (b) square lattice, i.e., AB and AA packings, respectively. The dipoles are depicted as arrows located in the center of the spheres. In case of triangular lattice the unit cell consists of a single particle (as noted in panel (a) of this figure) and in case of square lattice it consists of four particles (as noted in panel (b) of this figure). (c) Energy landscape for square lattice is shown with respect to two θ 1 and θ 2 out of four magnetic moments in the unit cell. Other two moments were oriented so the energy of the system is minimal. One can observe a flat valley of degenerate ground state, θ 2 = −θ 1 , with energy u AA −2.5494. The saddle point which represents square plane
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My PhD thesis about the research in the fields of computational magnetism (helices composed of dipolar hard spheres) and computational nanotribology (ionic liquids as lubricants in automotive industry).
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