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Figure 2. (A) HfO2 crystal structures for M-phase (P21/c), two non-centrosymmetric O-phases (Pmn21 and Pca21) and two centrosymmetric O-phases (Pbcm and Pbca) and their atom projections along four major zone axes. (B) STEM-HAADF images of
Figure 2. (A) HfO2 crystal structures for M-phase (P21/c), two non-centrosymmetric O-phases (Pmn21 and Pca21) and two centrosymmetric O-phases (Pbcm and Pbca) and their atom projections along four major zone axes. (B) STEM-HAADF images of
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