Calculation of Positron States and Annihilation Parameters in Gamma and Amorphous Al2O3 |
| S. Ishibashia, A. Uedonob
aResearch Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan bDivision of Applied Physics, Faculty of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan |
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| We calculate positron states and annihilation parameters theoretically in gamma and amorphous Al2O3 and compared with those in alpha Al2O3. They show systematic variations and are investigated in terms of relationships with microscopic structures and densities. Good correlations of the positron annihilation parameters with the density are observed. |
DOI:10.12693/APhysPolA.137.231 PACS numbers: 71.60.+z, 78.70.Bj, 71.55.Jv |