Electronic properties of PbS(111) twin boundaries and twinning superlattices |
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| Affiliation: | 1. WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan;2. Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan;3. Research Center for Structure Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan;4. Department of Metallurgy, Formerly graduate student, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan;5. The Electron Microscopy Center, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan |
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| Abstract: | We have studied the electronic properties of single twin boundaries and twinning superlattices in lead sulfide. The results are compared against those obtained previously for such structures based on diamond/zincblende type materials, and substantial differences are noted. It is found that lead sulfide twinning superlattices can have significantly wider or narrower band gaps than the homogeneous material, depending on whether the twin interface is occupied by anion or cation atoms. |
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