Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"triplet pair"”.
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Synthesis and Optical Characterisation of Diphenylhexatriene Derived Intramolecular Singlet Fission Materials
… photon can only produce a single electron-hole pair; all excess energy above the bandgap of the semiconductor is lost to thermalisation. Singlet fission (SF) is a physical process in certain organic materials that enables the production of two excited states, each with triplet multiplicity, from …
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Spin-sensitive probes of triplet excitons in organic semiconductors
… investigates the spin interactions of spin-1 triplet excitons formed by singlet fission. Singlet fission produces two triplet excitons from one light-induced singlet state and holds promise to enable solar energy generation beyond traditional efficiency limits. As the lifetime of triplet pairs …
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Modern Electronic Structure Theory using Tensor Product States
… type of strongly correlated system, correlated triplet pair states that arise in singlet fission. The many-body expansion (MBE) is an efficient tool that has a long history of use for calculating interaction energies, binding energies, lattice energies, and so on. We extend the incremental full …
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Singlet Exciton Fission in Acene Dimer and Diradicaloid Molecules
… process that leads to ultrafast generation of triplet excitons following photoexcitation, singlet exciton fission, in three different acene dimers and diradicaloids. In pentacene and tetracene dimers, we investigate their mechanism of singlet fission. In a series of diradicaloids, we study the …
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Superconducting phase transitions in hybrid superconducting systems with ferromagnets and spin-orbit coupling
… h_c2. In finite sized samples, singlet-to-triplet conversion results in spin magnetisation at the sample edges. This edge effect suppresses the phase transition. Due to the sample size-dependence, the transition can be controlled in shape-anisotropic samples by rotating the applied magnetic …
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Spin-mixing and transport through superconducting interlayers in ferromagnetic Josephson junctions
… memory elements. Supercurrents of spin-aligned triplet Cooper pairs (or ’triplet pairs’) can be generated at magnetically inhomogeneous superconductor/ferromagnet interfaces, and have a longer decay envelope in a ferromagnet than singlet Cooper pairs (or ’singlet pairs’). In this thesis I …
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Spin-triplet proximity effects in magnetically controlled heterostructures with s-wave superconductors
… antagonistic order parameters due to the rapid depairing of conventional spin-singlet Cooper pairs in the presence of a magnetic exchange field. Over the last decade-and-half, experimental evidence has emerged for the generation of spin-triplet Cooper pairs, which have parallel aligned spins, and …