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Book Chapter:
[1] Shaikh Ahmed*, Neerav Kharche*, Rajib Rahman*, Muhammad Usman*, Sunhee Lee, Hoon Ryu, Hansang Bae, Steve Clark, Benjamin Haley, Maxim Naumov, Faisal Saied, Marek Korkusinski, Rick Kennel, Michael McLennan, Timothy B. Boykin, and Gerhard Klimeck , "Multimillion Atom Simulations with NEMO 3-D ", Published in Springer Encyclopedia for Complexity, 2007. (*Authors contributed equally)
Journal Paper:
[1] Hoon Ryu*, Muhammad Usman*, and Gerhard Klimeck, “Geometrical Dependence of Ground State Optical Transitions in Self-assembled InAs/GaAs Quantum Dots”, to be submitted to Phys. Rev B. (*Authors contributed equally)
[2] Muhammad Usman and Gerhard Klimeck, “Ground state optical transitions in self-assembled InAs/GaAs quantum dots: In-plane electrical field dependence”, to be submitted to Applied Physics Letter.
[3] Muhammad Usman, Hoon Ryu and Gerhard Klimeck,, “Moving towards nano-TCAD through multi-million atom quantum dot simulations matching experimental data”, Accepted in IEEE Trans. on Nanotechnology, Oct 23, 2008
[4] Gerhard Klimeck, Shaikh Ahmed, Neerav Kharche, Marek Korkusinski, Muhammad Usman, Marta Prada, and Timothy B. Boykin , "Atomistic Simulation of Realistically Sized Nanodevices Using NEMO 3-D: Part II - Applications", (INVITED) Special Issue on Nanoelectronic Device Modeling in IEEE Transactions on Electron Devices, Vol. 54, Issue 9, Sept. 2007 Page(s):2090 - 2099 (2007)
Conference Proceedings and Presentations:
[1] Muhammad Usman, and Gerhard Klimeck, “Atomistic study of quantum confined stark effect in InAs/GaAs quantum dots: Dependence on vertical and in-plane electrical field”, submitted for oral presentation in MRS Spring Meeting April 2009 San Francisco
[2] Gerhard Klimeck, Neerav Kharche, Muhammad Usman, Timothy B. Boykin, "Multi-Million Atom Simulations of Strain and Electronic Structure with NEMO 3-D ", Materials Science and Technology Conference and Exhibition (MS&T), Pittsburgh, October 5-9, 2008. (Invited Presentation)
[3] Muhammad Usman*, Hoon Ryu*, Shaikh Ahmed and Gerhard Klimeck, “Atomistic tight binding study of interband light transitions in self-assembled InAs/GaAs quantum dots”, accepted for Oral presentation in MRS fall 2008 meeting (Dec 1-5) Boston (*Authors contributed equally)
[4] Muhammad Usman, Dragica Vasileska, and Gerhard Klimeck, “Strain-engineered self-organized InAs/GaAs quantum dots for long wavelength applications”, Presented in 29th ICPS Conference July 2008 Brazil (Poster presentation)
[5] Muhammad Usman, Shaikh Ahmed, and Gerhard Klimeck, "A tight binding study of strain-reduced confinement potentials in identical and non-identical InAs/GaAs vertically stacked quantum dots", Presented in 8th International IEEE Conference on Nanotechnology, 2008 (Oral presentation).
[6] Gerhard Klimeck, Neerav Kharche, Muhammad Usman, and Mathieu Luisier, "Atomistic Simulation of Realistically Sized Nanodevices Using NEMO 3-D and OMEN", Nanoelectronics Days, Aachen, Germarny, May 13-16, 2008 (Invited presentation).
[7] Muhammad Usman, shaikh Ahmed and Gerhard Klimeck, “Strain and Piezoelectric effect on electronic structure of vertically stacked InAs/GaAs Quantum dots”, Presented in APS March meeting 2008 New Orleans LO
[8] Muhammad usman, “Strain and electronic structure calculations in realistically scaled InAs/GaAs quantum dot systems”, Presented in 1st NCN Student Research Symposium Purdue University, 2008. (Invited presentation)
[9] Shaikh Ahmed, Muhammad Usman, Neerav Kharche, Andrei Schliwa, and Gerhard Klimeck, "Atomistic Simulation of Non-Degeneracy and Optical Polarization Anisotropy in Pyramidal Quantum Dots", Proceedings of IEEE NEMS Jan 16-19, 2007, Bangkok Thailand (Oral presentation, 340 submissions, 90% acceptance, 55% oral presentations)
[10] Shaikh Ahmed, Muhammad Usman, Clemens Heitzinger. Rajib Rahman, Andrei Schliwa, and Gerhard Klimeck, "Symmetry Breaking and Fine Structure Splitting in Self-Assembled Zincblende Quantum Dots: Atomistic Simulations of Long-Range Strain and Piezoelectric Field", proceedings of the 28th International Conference on the Physics of Semiconductors, ICPS 2006, Vienna, Austria, July 24-28 2006, AIP Conference Proceedings Volume 893, pg 849.
[11] Muhammad Usman, Shaikh Ahmed, Marek Korkusinski, Clemens Heitzinger, and Gerhard Klimeck, "Strain and electronic structure interactions in realistically scaled quantum dot s tacks", proceedings of the 28th International Conference on the Physics of Semiconductors, ICPS 2006, Vienna, Austria, July 24-28 2006, AIP Conference Proceedings Volume 893, pg. 847
[12] Gerhard Klimeck, Shaikh Ahmed, Clemens Heitzinger, Neerav Kharche, Muhammad Usman, Mathieu Luisier, Raseong Kim, Neophytos Neophytou, Michael McLennan, and Timothy B. Boykin, "Quantum Dot, Nanowire, Bandstructure Modeling and Deployment on nanoHUB.org", International Topical Workshop "Tera- and Nano-Devices: Physics and Modeling", University of Aizu, Aizu-Wakamatsu, Japan in October 16-19, 2006. (invited presentation)
[13] Sebastien Goasguen, Jon Camden, Muhammad Usman, Steven Clark, Jaime Frey, Clemens Heitzinger, and Gerhard Klimeck, "nanoHUB - nanoscience gateway to the TeraGrid", Teragrid 2006, Indianapolis, IN June 12-15, 2006.
nanoHub.org Contributions:
[1] Quantum Dot Lab (Expected to available for general community by the end of Fall 2008).
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