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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/184900
Degeneracy and hysteresis in a bidisperse colloidal ice
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We use numerical simulations to investigate the low-energy states of a bidisperse colloidal ice, realized by confining two types of magnetic particles into double wells of different lengths. For this system, theoretical calculations predict a highly degenerate ground state where all the vertices with zero topological charge have equal energy. When raising the applied field, we find a re-entrant transition where the system passes from the initial disordered state to a low-energy one and then back to disorder for large interaction strengths. The transition is due to the particle localization on top of the central hill of the double wells, as revealed from the position distributions. When we decrease the applied field, the system displays hysteresis in the fraction of low-energy vertices, and a small return point memory by cycling the applied field.
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RODRÍGUEZ GALLO, Carolina, ORTIZ-AMBRIZ, Antonio and TIERNO, Pietro. Degeneracy and hysteresis in a bidisperse colloidal ice. Physical Review Research. 2021. Vol. 3, num. 4, pags. 043023. ISSN 2643-1564. [consulted: 4 of August of 2026]. Available at: https://hdl.handle.net/2445/184900