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dc.contributor.authorTodd, Seth
dc.date.accessioned2018-09-28T14:11:18Z
dc.date.available2018-09-28T14:11:18Z
dc.identifier.urihttp://hdl.handle.net/10222/74272
dc.description.abstractHalide perovskites have emerged as a promising class of materials for spintronic applications due to their large spin-orbit coupling and Rashba splitting. In this thesis, circularly polarized pump-probe spectroscopy was used to study the spin dynamics and relaxation mechanisms in the 2D perovskite butylammonium methylammonium lead iodide, BA2MAPb2I7. The spin lifetime and initial degree of spin polarization was found to be 10 ps and 80% respectively for above bandgap laser excitation at room temperature. Spin lifetime and degree of spin polarization increased with laser fluence and decreased with excess energy above bandgap, indicating the dominant spin relaxation mechanism at room temperature is D'yakonov-Perel'. A strong reduction in the spin polarization was observed in the low-temperature phase, attributed to subpicosecond electron spin relaxation, with a residual spin lifetime of 100 ps at 10 K attributed to holes. These results will help assess the viability of 2D perovskites for applications in spintronics.en_US
dc.language.isoenen_US
dc.subjectPerovskiteen_US
dc.subjectSpintronicsen_US
dc.subjectPump-Probe Spectroscopyen_US
dc.subjectSpin Relaxationen_US
dc.titlePUMP PROBE STUDIES OF SPIN DYNAMICS IN THE 2D PEROVSKITE BUTYLAMMONIUM METHYLAMMONIUM LEAD IODIDEen_US
dc.date.defence2017-08-16
dc.contributor.departmentDepartment of Physics & Atmospheric Scienceen_US
dc.contributor.degreeMaster of Scienceen_US
dc.contributor.external-examinern/aen_US
dc.contributor.graduate-coordinatorTheodore Moncheskyen_US
dc.contributor.thesis-readerLaurent Kreplaken_US
dc.contributor.thesis-readerJesse Maassenen_US
dc.contributor.thesis-supervisorKimberley Hallen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.manuscriptsNot Applicableen_US
dc.contributor.copyright-releaseYesen_US
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