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Spin-Crossover and Massive Anisotropy Switching of 5d Transition Metal Atoms on Graphene Nanoflakes

In spin crossover phenomena, the magnetic moment of a molecule is switched by external means. Here we theoretically predict that several 5d-transition metals (TMs) adsorbed on finite graphene flakes undergo a spin crossover, resulting from multiple adsorption minima, that are absent in the zero-dimensional limit of benzene and the two-dimensional limit of graphene. The different spin states are stable at finite temperature and can be reversibly switched with an electric field. The system undergoes a change in magnetic anisotropy upon spin crossover, which facilitates read-out of the spin state. The TM-decorated nanoflakes thus act as fully controlled single-ion magnetic switches.

Folding and Self-Assembly of the TatA Translocation Pore Based on a Charge Zipper Mechanism

► Charge zippers as a new concept for folding and assembly of membrane proteins ► 3D structure of TatA pore explains translocation of folded proteins across membrane ► Ladders of salt bridges connect an amphiphilic palisade that can span the bilayer ► MD simulations and specific charge mutations support the charge zipper model

Membrane Proteins