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. 2023 Feb 6;14:644. doi: 10.1038/s41467-023-36385-4

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Fig. 4 — The K migration paths of the a–c VO₂ (a), d VO₂ (B), e VO₂ (M). f Migration energy of K⁺ ions for VO₂ in the three different phases. The DOS before and after K⁺ insertion for g VO₂ (a), h VO₂ (B), i VO₂ (M). (The partial density of states for the potassium is magnified by a factor of 200 for better visibility.).