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Nonuniform Composition Profile inIn0.5Ga0.5AsAlloy Quantum Dots
Abstract
We use cross-sectional scanning tunneling microscopy to examine the shape and composition distribution of In0.5Ga0.5As quantum dots (QDs) formed by capping heteroepitaxial islands. The QDs have a truncated pyramid shape. The composition appears highly nonuniform, with an In-rich core having an inverted-triangle shape. Thus the electronic properties will be drastically altered, relative to the uniform composition generally assumed in device modeling. Theoretical analysis of the QD growth suggests a simple explanation for the unexpected shape of the In-rich core.
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Cited by
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Lodahl, P., Mahmoodian, S., & Stobbe, S. (2015) · Reviews of Modern Physics · doi:10.1103/revmodphys.87.347 · Cited by 1,465
Structural properties of self-organized semiconductor nanostructures
Stangl, J., Holý, V., & Bauer, G. (2004) · Reviews of Modern Physics · doi:10.1103/revmodphys.76.725 · Cited by 801
Optical Properties of Metal Nanoparticles with Arbitrary Shapes
Sosa, I. O., Noguez, C., & Barrera, R. G. (2003) · The Journal of Physical Chemistry B · doi:10.1021/jp0274076 · Cited by 800
Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
Krenner, H. J., Sabathil, M., Clark, E. C., Kress, A., Schuh, D., Bichler, M., Abstreiter, G., & Finley, J. J. (2005) · Physical Review Letters · doi:10.1103/physrevlett.94.057402 · Cited by 368
Metadata
- Authors
- Liu, N., Tersoff, J., Baklenov, O., Holmes, A. L., & Shih, C. K.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2000-01-10
- Volume
- 84
- Issue
- 2
- Pages
- 334-337
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W93153530
- Cited by
- 263
- References
- 0
- FWCI
- 17.31
- Type
- journal article
- Language
- en
- Open access
- closed
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- Liu, N., Tersoff, J., Baklenov, O., Holmes, A. L., & Shih, C. K. (2000). Nonuniform Composition Profile inIn0.5Ga0.5AsAlloy Quantum Dots. Physical Review Letters. https://doi.org/10.1103/physrevlett.84.334
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