Recent papers on nanostructure

Self-Assembled quantum dots

  1. S.L. Sewall, A. Franceschetti, R.R. Cooney, A. Zunger, and P. Kambhampati1 Direct observation of the structure of band-edge biexcitons in colloidal semiconductor CdSe quantum dots Phys. Rev. B (Rapid Comm.) 80 081310(R) (2009) (pdf).

  2. V. Mlinar, M. Bozkurt, J.M. Ulloa, M. Ediger, G. Bester, A. Badolato, P.M. Koenraad, R. J. Warburton, and A. Zunger Closing the loop between structure and spectroscopy in semiconductor quantum dots submitted (2009) (pdf).

  3. J.-W. Luo, G. Bester, and A. Zunger Atomistic description of the relative roles of long- and short-range electron-hole exchange interactions in quantum dots New J. Phys. submitted (2009) (pdf).

  4. Vladan Mlinar and Alex Zunger, Spectral barcoding of quantum dots: Deciphering structural motifs from the excitonic spectra Phys. Rev. B 80 035328 (2009) (pdf).

  5. J.-W. Luo, A. Franceschetti, and A. Zunger Direct-Bandgap InAs Quantum-Dots Have Long-Range Electron-Hole Exchange whereas Indirect Gap Si Dots Have Short-Range Exchange Nano Lett. (2009) (pdf).

  6. Voicu Popescu, Gabriel Bester, and Alex Zunger Coexistence and coupling of zero-dimensional, two-dimensional, and continuum resonances in nanostructures Phys. Rev. B 80 045327 (2009) (pdf).

  7. V. Popescu, G. Bester, and A. Zunger, Strain-induced localized states within the matrix continuum of self-assembled quantum dots Applied Physics Letters 95 , 023108 (2009) (pdf).

  8. A. Franceschetti, J.W. Luo, J.M. An, and A. Zunger, Origin of one-photon and two-photon optical transitions in PbSe nanocrystals Phys. Rev. B. (Rapid Comm.) 79, 241311(R) (2009) (pdf).

  9. Vladan Mlinar, Alberto Franceschetti, and Alex Zunger Rules of peak multiplicity and peak alignment in multiexcitonic spectra of (In,Ga)As quantum dots Phys. Rev. B (Rapid. Comm.) 79 121307(R) (2009) (pdf).

  10. J.-W. Luo, A. Franceschetti, and A. Zunger Nonmonotonic size dependence of the dark/bright exciton splitting in GaAs nanocrystals Phys. Rev. B. 79, 201301 (2009) (pdf).

  11. J.-W. Luo, G. Bester, and A. Zunger Full-zone spin-splitting for electrons and holes in bulk GaAs and GaSb Phys. Rev. Lett. 102, 056405 (2009) (pdf).

  12. J.-W. Luo, G. Bester, and A. Zunger Atomistic Pseudopotential Calculations of Thickness Fluctuation GaAs Quantum Dots Phys. Rev. B 79, 125329 (2009) (pdf).
  13. Vladan Mlinar and Alex Zunger Effect of atomic-scale randomness on the optical polarization of semiconductor quantum dots Phys. Rev. B 79 115416 (2009) (pdf).

  14. J.-W. Luo, A. Franceschetti, and A. Zunger Carrier Multiplication in Semiconductor Nanocrystals: Theoretical Screening of Candidate Materials Based on Band-Structure Effects Nano Lett. 8 (10), 3174-3181 (2008) (pdf).
  15. L. He, M. Gong, C.-F. Li, G.-C. Guo, and A. Zunger Highly-reduced fine-structure splitting in InAs/InP quantum dots offering efficient on-demand 1.55 m entangled photon emitter Phys. Rev. Letts 101, 157405 (2008) (pdf).
  16. Voicu Popescu, Gabriel Bester, Mark C. Hanna, Andrew G. Norman, and Alex Zunger Theoretical and experimental examination of the intermediate-band concept for strain-balanced (In,Ga)As/Ga(As,P) quantum dot solar cells Phys. Rev. B 78, 205321 (2008) (pdf).
  17. J.-W. Luo, A. Franceschetti, and A. Zunger Quantum-size-induced electronic transitions in quantum dots: Indirect band-gap GaAs Phys. Rev. B 78, 035306 (2008) (pdf).
  18. C. Curutchet, A. Franceschetti, A. Zunger; and G. D. Scholes Examining Forster Energy Transfer for Semiconductor Nanocrystalline Quantum Dot Donors and Acceptors J. Phys. Chem. C 11, 13336-13342 (2008). (pdf).
  19. M. Ediger, G. Bester, A. Badolato, P. M. Petroff, K. Karrai, A. Zunger & R. J. Warburton Peculiar many-body effects revealed in the spectroscopy of highly charged quantum dots Nature Physics 3, 774 - 779 (2007) (pdf).
  20. Lixin He, Gabriel Bester, Zhiqiang Su, Alex Zunger Calculation of near-field scanning optical images of exciton, charged excition and multiexciton wavefunctions in self-assembled InAs/GaAs quantum dots Physical Review B 76, 035313 (2007) (pdf).
  21. Lixin He and Alex Zunger Electronic structures of (In,Ga)As/GaAs quantum dot molecules made of dots with dissimilar sizes Phys. Rev. B 75, 075330 (2007) (pdf).
  22. Gustavo A. Narvaez and Alex Zunger Calculation of conduction-to-conduction and valence-to-valence transitions between bound states in (In,Ga)As/GaAs quantum dots Phys. Rev. B 75, 085306 (2007) (pdf).
  23. G. Bester, D. Reuter, L. He, A. Zunger, P. Kailuweit, A.D. Wieck, U. Zeitler, J.C. Maan, O. Wibbelhoff, A. Lorke, Experimental imaging and atomistic modeling of electron and hole quasiparticle wave functions in InAs/GaAs quantum dots, Phys. Rev. B 76, 075338 (2007) (pdf ).
  24. M. Ediger, G. Bester, B.D. Gerardot, A. Badolato, P.M. Petroff, K. Karrai, A. Zunger and R.J. Warburton, Fine Structure of Negatively and Positively Charged Excitons in Semiconductor Quantum Dots: Electron-Hole Asymmetry, Phys. Rev. Lett. 98, 036808 (2007) (pdf).
  25. A. Zunger, A. Franceschetti,G. Bester, W.B. Jones, K. Kim, P.A. Graf, L.-W. Wang, A. Canning, O. Marques, C. Voemel, J. Dongarra, J. Langou, and S. Tomov , Predicting the Electronic Properties of 3D, Million-Atom Semiconductor Nanostructure Architectures J. of Physics 46, 292-298 (2006) (pdf).
  26. G. Bester, A. Zunger, X. Wu and D. Vanderbilt, Effects of linear and nonlinear piezoelectricity on the electronic properties of InAs/GaAs quantum dots, Phys. Rev. B. (Rapid Comm.) 74, 081305(R) (2006) (pdf).
  27. G. A. Narvaez, G. Bester, A. Franceschetti, and A. Zunger, Excitonic exchange effects on the radiative decay time of monoexcitons and biexcitons in quantum dots, Phys. Rev. B. 74, 205422 (2006) (pdf).
  28. G. Bester, X. Wu, D. Vanderbilt and A. Zunger, Importance of second-order piezoelectric effects in zincblende semiconductors, Phys. Rev. Lett.  93,  187602 (2006) (pdf).
  29. Gustavo A. Narvaez, Gabriel Bester, and Alex Zunger, Carier relaxation mechanisms in self-assembled (In,Ga)As/GaAs quantum dots: Efficient P->S relaxation of electrons. Phys. Rev. B 74, 075403 (2006). (pdf).
  30. Gustavo A. Narvaez and Alex Zunger, Nominally forbidden transitions in the interband optical spectrum of quantum dots, Phys. Rev. B. 74, 045316 (2006) (pdf).
  31. Lixin He and Alex Zunger, Multiple charging of InAs/GaAs quantum dots by electrons or holes: addition energies and ground-state configurations, Phys. Rev. B 73 115324 (2006) (pdf).
  32. Gustavo A. Narvaez, Lixin He, Gabriel Bester and Alex Zunger, Theoretical predictions of the electronic and optical properties of single and coupled (In,Ga)As/GaAs quantum dots, Physica E 32, 93 (2006) (pdf).
  33. Gustavo A. Narvaez, Gabriel Bester and Alex Zunger, Excitons, biexcitons and trions in self-assembled InGaAs/GaAs quantum dots: Recombination energies, polarization and radiative lifetimes vs dot height, Phys. Rev. B 72, 245318 (2005) (pdf).
  34. Lixin He, Gabriel Bester and Alex Zunger, Electronic phase diagrams of carriers in self-assembled InAs/GaAs quantum dots: violation of Hund's rule and the Aufbau principle for holes,  Phys. Rev. Lett. 95 246804 (2005) (pdf).
  35. Lixin He, Gabriel Bester and Alex Zunger, Singlet-triplet splitting, correlation and entanglement of two electrons in quantum dot molecules,  Phys. Rev. B 72, 195307 (2005) (pdf).
  36. Gustavo A. Narvaez, Gabriel Bester and Alex Zunger, Pressure effects on neutral and charged excitons in self-assembled (In,Ga)As/GaAs quantum dots.  Phys. Rev. B 72, 041307(R) (2005) (pdf ).
  37. Gabriel Bester and Alex Zunger, Electric field control and optical signature of entanglement in quantum dot molecules. Phys. Rev. B 72, 165334 (2005) (pdf ).
  38. Gustavo A. Narvaez, Gabriel Bester and Alex Zunger, Dependence of the electronic structure of self-assembled (In,Ga)As/GaAs quantum dots on height and composition.  J. Appl. Phys. 98, 043708 (2005) (pdf).
  39. Lixin He, Gabriel Bester and Alex Zunger, Electronic asymmetry in self-assembled quantum dot-molecules made of identical InAs/GaAs quantum dot,  Phys. Rev. B, 72, 081311(R) (pdf).
  40. Gabriel Bester, J. Shumway and Alex Zunger, Broken-Symmetry and Quantum Entanglement of an exciton in InGaAs/GaAs Quantum Dot Molecules, Phys. Rev. B  71,  075325 (2005) (pdf).
  41. Lixin He, Gabriel Bester and Alex Zunger, Strain induced interfacial hole localization and light/heavy hole reversal in self-assembled quantum dots: compressive InAs/GaAs vs. tensile InAs/InSb,  Phys. Rev. B 70, 235316 (2004) (pdf).
  42. Lixin He, Gabriel Bester and Alex Zunger, Prediction of an excitonic ground state in InAs/InSb quantum dots,  Phys. Rev. Lett. 94, 016801 (2005) (pdf).
  43. Gabriel Bester and Alex Zunger, Cylindrically shaped zinc-blende semiconductor quantum dots do not have cylindrical symmetry:   Atomistic symmetry, atomic relaxation, and piezoelectric effects, Phys. Rev. B 71, 045318 (2005) (pdf).
  44. Gabriel Bester, J. Shumway and Alex Zunger, Theory of excitonic spectra and entanglement engineering in dot molecules, Phys. Rev. Lett. 93, 047401 (2004) (pdf).
  45. Alex Zunger and Gabriel Bester, Theory of excitons, charged excitons, exciton fine-structure and entangled excitons in self-assembled semiconductor quantum dots, Physica E 21, 204 (2004) (pdf).
  46. Gabriel Bester and Alex Zunger, Compositional and size-dependent spectroscopic shifts in charged self-assembled InxGa1-xAs/GaAs quantum dots, Phys. Rev. B 68, 073309 (2003) (pdf).
  47. Gabriel Bester, S. Nair, and Alex Zunger, Pseudopotential calculation of the excitonic fine structure of million-atom self-assembled In1-xGaxAs/GaAs quantum dots, Phys. Rev. B 67, R161306 (2003) (pdf).

Colloidal quantum dots

  1. J. M. An, M. Califano, A. Franceschetti, and A. Zunger Excited-state relaxation in PbSe quantum dots J. Chem. Phys. 128, 164720 (2008) (pdf).
  2. J. M. An, A. Franceschetti, and A. Zunger Pauli Blocking Versus Electrostatic Attenuation of Optical Transition Intensities in Charged PbSe Quantum Dots Phys. Rev. B Rapid Communication 76, 161310 (2007) (pdf).
  3. J. M. An, A. Franceschetti, and A. Zunger Electron and hole addition energies in PbSe quantum dots Phys. Rev. B 76, 045401 (2007) (pdf).
  4. J. M. An, A. Franceschetti, and A. Zunger The Excitonic Exchange Splitting and Radiative Lifetime in PbSe Quantum Dots Nano Lett., 7 2129 - 2135, 2007 (pdf).
  5. Marco Califano, Alex Zunger, and Alberto Franceschetti, Lifetime and polarization of the radiative decay of excitons, trions and biexcitons in CdSe nanocrystal quantum dots, Phys. Rev. B 75, 115401 (2007) (pdf).
  6. Joonhee An, Alberto Franceschetti, and Alex Zunger, The peculiar electronic structure of PbSe quantum dots, Nano Letters 6, 2728 (2006) (pdf).
  7. Alberto Franceschetti, Joonhee An, and Alex Zunger, Impact ionization can explain carrier multiplication in PbSe quantum dots, Nano Letters 6, 2191 (2006) (pdf).
  8. Alberto Franceschetti, Lin-Wang Wang, Gabriel Bester, and Alex Zunger, Confinement-induced versus correlation-induced electron localization and wave function entanglement in semiconductor nano dumbbells, Nano Letters 6, 1069 (2006) (pdf).
  9. Marco Califano, Alberto Franceschetti, and Alex Zunger, Temperature dependence of excitonic radiative decay in CdSe quantum dots: The role of surface hole traps, Nano Letters 5, 2360 (2005) (pdf).
  10. Marco Califano and Alex Zunger, Anisotropy of interband transitions in InAs quantum wires: an atomistic theory, Phys. Rev. B 70, 165317 (2004) (pdf).
  11. Marco Califano, Alex Zunger, and Alberto Franceschetti, Efficient inverse Auger recombination at threshold in CdSe nanocrystals, Nano Letters 4, 525 (2004) (pdf) .
  12. Marco Califano, Alex Zunger, and Alberto Franceschetti, Direct carrier multiplication due to inverse Auger scattering in CdSe quantum dots, Appl. Phys. Letts. 84, 2409 (2004) (pdf).
  13. Marco Califano, Gabriel Bester, and Alex Zunger, Prediction of a Shape-Induced Enhancement in the Hole Relaxation in Nanocrystals, Nano Letters 3, 1197 (2003) (pdf) .
  14. L.W. Wang, M. Califano, A. Zunger and A. Franceschetti Pseudopotential Theory of Auger Processes in CdSe Quantum Dots, Physical Review Letters 91, 056404 (2003). (pdf) .