Simulations of Dislocations in CdZnTe/SL/Si Substrates
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- Ciani, A.J. & Chung, P.W. Journal of Elec Materi (2010) 39: 1063. doi:10.1007/s11664-009-1039-1
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Discrete dislocation dynamics simulations were employed to study the primary mechanisms by which superlattices (SLs) block threading dislocations (TDs) from reaching the surface of a composite CdZnTe/SL/Si substrate. We found that the difference in strain (composition) across layer boundaries played a key role as to whether a TD might veer away or continue across. We also found that, while the distance between interfaces had little effect on the motion of a single TD, it could have an impact on the dislocation tangle as a whole and should be considered carefully in SL design. We discuss our results in relation to the design of SLs for TD blocking.