期刊
PHYSICAL REVIEW B
卷 81, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.205309
关键词
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资金
- MEXT Japan [20760020]
- MEXT Japan through Tokyo Institute of Technology
- Grants-in-Aid for Scientific Research [20760020] Funding Source: KAKEN
We report on atomic structures and energetics of 90 degrees dislocation cores in Ge films on Si(001) substrates on the basis of the first-principles total-energy calculations. The dislocation core structure consisting of a row of pairs of five- and seven-membered Ge rings is proposed and found to be stable with increasing Ge overlayers. The scanning tunneling microscopy images of the 90 degrees dislocation core structure are calculated and show the possibility to observe the proposed core structure.
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