Q.R. Huang, Ho-Cheol Kim, et al.
Macromolecules
We calculated the potential of interstitial oxygen in YBa2Cu3O7 using effective medium theory. We found that there is no potential energy barrier for oxygen motion in the [1/2, b,0] tunnel. Oxygen motion in the a and c directions requires overcoming barriers of 1.7 and 1.6 eV. Implications for superconductivity and oxygen diffusion are given. © 1988 Elsevier Science Publishers B.V.