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An epitaxial film is deposited with a lattice mismatch of 3% relative to a substrate whose...

  1. An epitaxial film is deposited with a lattice mismatch of 3% relative to a substrate whose diameter is 10 cm at room temperature. The epilayer grown at elevated temperature is thick enough that the residual strain is zero.
    1. If the Burgers vector is 2Å, what is the spacing between interfacial misfit-dislocations?
    2. Is it possible to prepare this epitaxial film strain free? Justify your answer.
Science   Advanced-Physics   
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3. An epitaxial film is deposited with a lattice mismatch of 3% relative to a substrate...
3. An epitaxial film is deposited with a lattice mismatch of 3% relative to a substrate whose diameter is 10 cm at room temperature. The epilayer grown at elevated temperature is thick enough that the residual strain is zero. a. If the Burgers vector is 2Å, what is the spacing between interfacial misfit-dislocations? b. Is it possible to prepare this epitaxial film strain free? Justify your answer.
An epitaxial film is deposited with a lattice mismatch of 2% relative to a substrate whose...
An epitaxial film is deposited with a lattice mismatch of 2% relative to a substrate whose diameter is 10 cm. The epilayer grown at elevated temperature is thick enough that the residual strain is zero. (a) If the Burgers vector is 2Å, what is the spacing between interfacial misfit-dislocations? (b) A misfit dislocation grid covers the entire film/substrate interface. What is the total length of the dislocation line? (c) Estimate the dislocation density.
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