Transition metal compounds Transition metals 12 Transition-metal oxides 8 Complexation 6 Metals 6 Resistive switching 6 Applied electric field 4 Computer simulation 4 Density functional theory 4 Electric fields 4 Hysteresis 4 Hysteresis switching 4 Initial state 4 Ligands 4 Manganese oxide 4 Metal complexes 4 Microscopic mechanisms 4 Oxygen 4 Oxygen vacancies 4 Realistic model 4 Resistance state 4 Switching 4 Switching thresholds 4 Vacancies 4 Air purification 2 Ammonia plants 2 Article 2 Back donation 2 Binding energy 2 Bins 2