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Magnetotransport in novel Dirac systems

Klier, Janina

Abstract (englisch):
In this thesis, the properties of magnetotransport of novel Dirac systems are outlined on the example of Weyl semimetals and carbon nanotubes with side-attached single-molecule magnets. In Weyl semimetals, we discussed the effects of impurities on transport showing that in both in absence and in presence of a finite magnetic field impurities can strongly affect the transport properties. Moreover, we showed that the experimentally observed huge transversal magnetoresistance in Weyl semimetals can be explained by a model of shifted Weyl nodes in energy with respect to each other in presence of Coulomb impurities. Related to the carbon nanotube system, we provided a theoretical model to describe the gate-controlled spin-valve effect and giant magnetoresistance. The important ingredients of the model are Coulomb interaction and spin dependent resonant scattering on Fano resonances between barriers.

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Volltext §
DOI: 10.5445/IR/1000090851
Veröffentlicht am 12.02.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Theorie der Kondensierten Materie (TKM)
Publikationstyp Hochschulschrift
Publikationsjahr 2019
Sprache Englisch
Identifikator urn:nbn:de:swb:90-908519
KITopen-ID: 1000090851
HGF-Programm 43.21.02 (POF III, LK 01) Quantum Properties of Nanostructures
Verlag Karlsruher Institut für Technologie (KIT)
Umfang XIII, 187 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Institut für Theorie der Kondensierten Materie (TKM)
Prüfungsdatum 20.07.2018
Referent/Betreuer PD Dr. I. Gornyi
Schlagwörter magnetotransport, Weyl semimetals, disorder, single molecule magnets, Fano resonances
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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