Tunable electron heating induced giant magnetoresistance in the high mobility GaAs/AlGaAs 2D electron system
Samaraweera, Rasanga L.
Mani, Ramesh G.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
Electron-heating induced by a tunable, supplementary dc-current (Idc) helps to vary the observed magnetoresistance in the high mobility GaAs/AlGaAs 2D electron system. The magnetoresistance at B = 0.3 T is shown to progressively change from positive to negative with increasing Idc, yielding negative giant-magnetoresistance at the lowest temperature and highest Idc. A two-term Drude model successfully fits the data at all Idc and T. The results indicate that carrier heating modifies a conductivity correction σ1, which undergoes sign reversal from positive to negative with increasing Idc, and this is responsible for the observed crossover from positive- to negative- magnetoresistance, respectively, at the highest B Show more
Journal / seriesScientific Reports
Pages / Article No.
PublisherNature Publishing Group
SubjectElectronic and spintronic devices; Electronic properties and materials
Organisational unit03833 - Wegscheider, Werner / Wegscheider, Werner
MoreShow all metadata