Háskólinn í ReykjavíkReykjavik UniversityErlingsson, Sigurdur I.Bardarson, Jens HManolescu, Andrei2019-10-112019-10-112018-04-12Erlingsson, S. I.; Bardarson, J. H.; Manolescu, A. Beilstein J. Nanotechnol. 2018, 9, 1156–1161. doi:10.3762/bjnano.9.1072190-4286https://hdl.handle.net/20.500.11815/1302This article is part of the Thematic Series "Topological materials".In this paper we consider charge current generated by maintaining a temperature difference over a nanowire at zero voltage bias. For topological insulator nanowires in a perpendicular magnetic field the current can change sign as the temperature of one end is increased. Here we study how this thermoelectric current sign reversal depends on the magnetic field and how impurities affect the size of the thermoelectric current. We consider both scalar and magnetic impurities and show that their influence on the current are quite similar, although the magnetic impurities seem to be more effective in reducing the effect. For moderate impurity concentration the sign reversal persists.1156-1161eninfo:eu-repo/semantics/openAccessElectrical and Electronic EngineeringGeneral Physics and AstronomyGeneral Materials ScienceNanowiresThermoelectric currentTopological insulatorsRafmagnsverkfræðiRafeindaverkfræðiEðlisfræðiEfnisfræðiNanótækniinfo:eu-repo/semantics/articleBeilstein Journal of Nanotechnology10.3762/bjnano.9.107