Interplay between Coulomb interaction and quantum-confined Stark-effect in polar and nonpolar wurtzite InN/GaN quantum dotsStefan Barthel, Kolja Schuh, Oliver Marquardt, Tilmann Hickel, Jörg Neugebauer, Frank Jahnke and Gerd CzychollEur. Phys. J. B, 86 11 (2013) 449DOI: https://doi.org/10.1140/epjb/e2013-40542-0