Doping-induced dimensional crossover and thermopower burst in Nb-doped SrTiO${}_3$ superlattices

P. Delugas, A. Filippetti, M. J. Verstraete +3

Using advanced ab-initio calculations, we describe the formation and confinement of a two-dimensional electron gas in short-period ($\simeq$4 nm) Nb-doped SrTiO${}_3$ superlattices a…