1.8k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of Colorado BoulderUS112 papers
- Colorado School of MinesUS59 papers
- King's College LondonGB30 papers
- Lawrence Berkeley National LaboratoryUS28 papers
- Fudan UniversityCN17 papers
- Radboud University NijmegenNL15 papers
- Stanford UniversityUS15 papers
- University of MinnesotaUS15 papers
- University of California, BerkeleyUS14 papers
- Colorado State UniversityUS13 papers
- North Carolina State UniversityUS12 papers
- Princeton UniversityUS12 papers
12 papers · 1 filter
Multiple charging of InAs/GaAs quantum dots by electrons or holes: addition energies and ground-state configurations
Lixin He, Alex Zunger
Atomistic pseudopotential plus configuration interaction calculations of the energy needed to charge dots by either electrons or holes are described, and contrasted with the widely…
Electron-induced stabilization of ferromagnetism in GaGdN
Gustavo M. Dalpian, Su-Huai Wei
Using {\it ab initio} band structure calculations and symmetry arguments, we show that the magnetic property of GaGdN is drastically different from TM-doped GaN. The co…
Excitons, biexcitons and trions in self-assembled (In,Ga)As/GaAs quantum dots: Recombination energies, polarization and radiative lifetimes versus dot height
Gustavo A. Narvaez, Gabriel Bester, Alex Zunger
We calculate the height dependence of recombination energies, polarization and radiative lifetimes of the optical transitions of various excitonic complexes: neutral excitons (X^0)…
Electronic phase diagrams of carriers in self-assembled InAs/GaAs quantum dots: violation of Hund's rule and the Aufbau principle for holes
Lixin He, Gabriel Bester, Alex Zunger
We study the orbital and spin configurations of up to six electrons or holes charged into self-assembled InAs/GaAs quantum dots via single-particle pseudopotential and many-particl…
Origin of transition metal clustering tendencies in GaAs based dilute magnetic semiconductors
Priya Mahadevan, J. M. Osorio-Guillen, Alex Zunger
While isovalent doping of GaAs (e.g. by In) leads to a repulsion between the solute atoms, two Cr, Mn, or Fe atoms in GaAs are found to have lower energy than the well-separated pa…
Band structure model of magnetic coupling in semiconductors
Gustavo M. Dalpian, Su-Huai Wei, X. G. Gong +2
We present a unified band structure model to explain magnetic ordering in Mn-doped semiconductors. This model is based on the - and - level repulsions between the Mn io…
Transition from Ferromagnetism to Antiferromagnetism in GaMnN
Gustavo M. Dalpian, Su-Huai Wei
Using density functional theory, we study the magnetic stability of the GaMnN alloy system. We show that unlike GaMnAs, which shows only ferromagnetic (FM)…
Pressure effects on neutral and charged excitons in self-assembled InGaAs/GaAs quantum dots
Gustavo A. Narvaez, Gabriel Bester, Alex Zunger
By combining an atomistic pseudopotential method with the configuration interaction approach, we predict the pressure dependence of the binding energies of neutral and charged exci…
Singlet-triplet splitting, correlation and entanglement of two electrons in quantum dot molecules
Lixin He, Gabriel Bester, Alex Zunger
Starting with an accurate pseudopotential description of the single-particle states, and following by configuration-interaction treatment of correlated electrons in vertically coup…
Anion vacancies as a source of persistent photoconductivity in II-VI and chalcopyrite semiconductors
S. Lany, A. Zunger
Using first-principles electronic structure calculations we identify the anion vacancies in II-VI and chalcopyrite Cu-III-VI2 semiconductors as a class of intrinsic defects that ca…
Dependence of the electronic structure of self-assembled InGaAs/GaAs quantum dots on height and composition
Gustavo A. Narvaez, Gabriel Bester, Alex Zunger
While electronic and spectroscopic properties of self-assembled In_{1-x}Ga_{x}As/GaAs dots depend on their shape, height and alloy compositions, these characteristics are often not…
Electric field control and optical signature of entanglement in quantum dot molecules
Gabriel Bester, Alex Zunger
The degree of entanglement of an electron with a hole in a vertically coupled self-assembled dot molecule is shown to be tunable by an external electric field. Using atomistic pseu…