Magnetoresistance and spin-orbit interaction in complex 2DEG systems : a study of Shubnikov-de Haas oscillations

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dc.contributorReykjavik Universityen_US
dc.contributorHáskólinn í Reykjavíken_US
dc.contributor.advisorSigurdur Ingi Erlingssonen_US
dc.contributor.authorGramizadeh, Hamed
dc.contributor.departmentDepartment of Engineering (RU)en_US
dc.contributor.departmentVerkfræðideild (HR)en_US
dc.contributor.schoolSchool of Technology (RU)en_US
dc.contributor.schoolTæknisvið (HR)en_US
dc.date.accessioned2023-06-14T11:57:07Z
dc.date.available2023-06-14T11:57:07Z
dc.date.issued2023-04-28
dc.description.abstractMagnetoresistance oscillations, also known as Shubnikov-de Haas (SdH) oscil- lations, is a well-known phenomena that results from the quantization of electron orbits in the presence of a magnetic field. These oscillations have been extensively studied and are a valuable experimental tool for extracting electronic charge densi- ties and spin-orbit interaction (SOI) couplings, such as Rashba and Dresselhaus cou- plings. Although 2DEGs with large Rashba, Dresselhaus, and g-factors are available, the current theoretical picture of explaining SdH behavior is not able to account for all those factors. Our findings show that by using a Poisson summation formula, we can analyze magneto-oscillations in 2DEGS systems with Rashba, Dresselhaus, and Zeeman couplings. The Poisson summation formula naturally separates the magne- tooscillations into fast and slow components which facilitates the analysis of the spin- orbit contribution. In this Ph.D. thesis, we investigate magnetooscillations in com- plex 2DEGs using both analytical and numerical methods thus providing a unique and comprehensive approach. Using the analytical approach, we identified a new condition for the vanishing of spin-orbit-related beatings. With numerical method, we are abled to extract both SOI couplings from the SdH oscillations independently of their Zeeman strength and electrical charge density. Additionally, we found that the behavior of SdH oscillations in such systems can be greatly influenced by the an- gle at which the in-plane magnetic field is tilted. This research contributes to the ongoing process of the development of novel spintronic devices.en_US
dc.description.sponsorshipReykjavik University, Ph.D funden_US
dc.identifier.isbn978-9935-539-15-1 (eISBN)
dc.identifier.isbn978-9935-539-14-4
dc.identifier.urihttps://hdl.handle.net/20.500.11815/4257
dc.language.isoenen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectMagnetoresistanceen_US
dc.subjectOscillationsen_US
dc.subjectSpintronicsen_US
dc.subjectTwo Dimensional Electron Gas Systemsen_US
dc.subjectSegulsviðen_US
dc.subjectRafsegulfræðien_US
dc.subjectSveiflufræðien_US
dc.subjectSveiflugreiningen_US
dc.subjectDoktorsritgerðiren_US
dc.titleMagnetoresistance and spin-orbit interaction in complex 2DEG systems : a study of Shubnikov-de Haas oscillationsen_US
dc.typeinfo:eu-repo/semantics/doctoralThesisen_US

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