Kumar, Mahesh and Rajpalke, Mohana K and Bhat, Thirumaleshwara N and Roul, Basanta and Kalghatgi, AT and Krupanidhi, SB (2011) Size dependent bandgap of molecular beam epitaxy grown InN quantum dots measured by scanning tunneling spectroscopy. In: Journal of Applied Physics, 110 (11). 114317 -114317.
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InN quantum dots (QDs) were grown on Si (111) by epitaxial Stranski-Krastanow growth mode using plasma-assisted molecular beam epitaxy. Single-crystalline wurtzite structure of InN QDs was verified by the x-ray diffraction and transmission electron microscopy. Scanning tunneling microscopy has been used to probe the structural aspects of QDs. A surface bandgap of InN QDs was estimated from scanning tunneling spectroscopy (STS) I-V curves and found that it is strongly dependent on the size of QDs. The observed size-dependent STS bandgap energy shifts with diameter and height were theoretical explained based on an effective mass approximation with finite-depth square-well potential model.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to American Institute of Physics.|
|Department/Centre:||Division of Chemical Sciences > Materials Research Centre|
|Date Deposited:||03 Jan 2012 08:57|
|Last Modified:||03 Jan 2012 08:57|
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