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Title: Symmetry and topology in triplet superconductors
Author: Mazidian, Bayan
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2013
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Ginzburg-Landau theory is the phenomenological theory through which phase transitions are understood. It is within this framework that the first insights into superconductivity were obtained. More recently superconductivity in systems with no inversion symmetry has become a topic of interest. In such systems lack of inversion symmetry is believed to allow singlet and triplet order parameters to be admixed although the pairing mechanism in some cases is unclear. This thesis Ginzburg-Landau theory to analyse the materials LaNiC2l LaNiGa2l Li2(PdxPtl -xhB and Mo2AhC. In the case of centrosymmetric LaNiGa2 a term coupling superconductivity to magnetism is introduced and shown to encourage the time-reversal symmetry (TRS) breaking non-unitary triplet state. In the case of Li2(PdxPtl-xhB an investigation of the nodal topologies arising from the Al irrep of the 0 group and corresponding specific heat signatures reveals a number of unique power law dependencies which can be used to detect topological transitions arising from triplet admixture in this system.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available