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Z3.23.1


    
     

      


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%&    ' ËÖ    ( ) * +,,-.     %/
      0%1   2       & 3 %&      &            4 &        &      %&                &   & & '   4&  25 &  %&        &       &  & 5 &        &  

      && ' ËÖ        4   &      


 


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 &  &  +!2;. . %&  G         5& 2 5  + ,. &   5      :     ?,, F %&              D / ? %/ 6,,-7   && &

+ -,.2   2      %&          &   &    +,,-.  !D;EÓ   &    3   &        

    &     & '  %& 5 ' ËÖ        

        &&    ! / ! %/ 6,,-7   %&             &      4 $ & & 

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     4.5 Na / Sr 4

Formation energy / eV

3.5 3

 % (' %&     

Na / Sr3Ti2O7

& &     ' ËÖ    & 5      / &2       6 7 %& : '    5  

  

2.5 2

Na O / Sr Ti O 2

3

2

7

1.5 1 0.5 0

O rich −7

−6

Na2O / SrO2 −5

−4

−3

−2

−1

0

µ(O) / eV

0.5 Na / Sr

Formation energy / eV

0

−0.5

 % )' %&    

 &  ' ËÖ     &         / &      6 7 %&

: '    5 2     

Na / Sr Ti O 3 2 7

−1

−1.5 Na O / Sr Ti O 2 3 2 7 −2 Na2O / SrO2

O rich −2.5 −7

−6

−5

−4 −3 µ(O) / eV

−2

−1

0

%&      & &     ' ËÖ   & 5      

    4 &      6 7 

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