Research output: Contribution to journal › Article › peer-review
First-principles periodic and semiempirical cyclic cluster calculations for single oxygen vacancies in crystalline Al2O3. / Janetzko, Florian; Evarestov, Robert A.; Bredow, Thomas; Jug, Karl.
In: Physica Status Solidi (B) Basic Research, Vol. 241, No. 5, 04.2004, p. 1032-1040.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - First-principles periodic and semiempirical cyclic cluster calculations for single oxygen vacancies in crystalline Al2O3
AU - Janetzko, Florian
AU - Evarestov, Robert A.
AU - Bredow, Thomas
AU - Jug, Karl
PY - 2004/4
Y1 - 2004/4
N2 - Single neutral and positively charged oxygen vacancies (F and F + centers) in α-Al2O3 are investigated using the supercell model (SCM) at the Hartree-Fock (HF) and density functional theory (DFT) level and the cyclic cluster model (CCM) implemented in the semiempirical MSINDO method. Results of supercell and cyclic cluster calculations for the cohesive energy of the perfect Al2O3 crystal are compared with the experimental value for the heat of atomization. The defect formation energy of the unrelaxed F center is calculated with the SCM. The CCM is used to calculate the defect formation energy of the F and the F+ centers. Relaxation effects for the nearest neighbors (NN) and the next-nearest neighbors (NNN) of the F and F+ centers are investigated. The obtained values are compared to other theoretical literature data.
AB - Single neutral and positively charged oxygen vacancies (F and F + centers) in α-Al2O3 are investigated using the supercell model (SCM) at the Hartree-Fock (HF) and density functional theory (DFT) level and the cyclic cluster model (CCM) implemented in the semiempirical MSINDO method. Results of supercell and cyclic cluster calculations for the cohesive energy of the perfect Al2O3 crystal are compared with the experimental value for the heat of atomization. The defect formation energy of the unrelaxed F center is calculated with the SCM. The CCM is used to calculate the defect formation energy of the F and the F+ centers. Relaxation effects for the nearest neighbors (NN) and the next-nearest neighbors (NNN) of the F and F+ centers are investigated. The obtained values are compared to other theoretical literature data.
UR - http://www.scopus.com/inward/record.url?scp=3142680530&partnerID=8YFLogxK
U2 - 10.1002/pssb.200301961
DO - 10.1002/pssb.200301961
M3 - Article
AN - SCOPUS:3142680530
VL - 241
SP - 1032
EP - 1040
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 5
ER -
ID: 84354251