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 11 of 11 for “"pairing symmetry"”.
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Pairing symmetry, competing orders, and quantum criticality in iron based superconductors via London penetration depth measurements
… by irradiation. This is evidence for an s{+−} pairing state. In Ba(Fe{1-x}Co^x)^2As^2 an aluminum coating procedure was employed to extract the zero-temperature value of the in-plane penetration depth λ{ab}(0) as a function of the cobalt concentration x, as it was varied through both the …
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Verification of d-wave pairing symmetry by microwave intermodulation distortion measurements in yttrium barium copper oxide
We report measurements of the temperature and power dependence of the microwave frequency intermodulation distortion (IMD) in high quality pulsed laser deposition (PLD) Yttrium Barium Copper Oxide (YBCO) on LaAlO3 substrate. A low-temperature (T < 30 K) increase in IMD is the observation of an …
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Josephson Interferometry Measurements in High-T(c) Grain Boundary Junctions
… these Josephson junctions depend strongly on the pairing symmetry and the electronic structure at the interface and can be used to determine the pairing symmetry as well as the structure of the grain boundary interface. Andreev reflection at the (110) surface in d-wave superconductors leads to the …
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Josephson Interferometry Measurements in High-Tc Grain Boundary Junctions
… these Josephson junctions depend strongly on the pairing symmetry and the electronic structure at the interface and can be used to determine the pairing symmetry as well as the structure of the grain boundary interface. Andreev reflection at the (110) surface in d-wave superconductors leads to the …
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MICROWAVE STUDY OF THE PROPERTIES OF UNCONVENTIONAL SUPERCONDUCTING SYSTEMS
… systems, such as superconductors with non-s-wave pairing symmetry and superconductors with non-trivial topology, are investigated by means of microwave techniques. The thesis consists of two parts. In Part 1, I will discuss a newly developed microwave superconducting gap spectroscopy system. Using …
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Group theoretical approach to pairing and non-linear phenomena in atomic nuclei
… studying proton-neutron (pn) and like-nucleon pairing correlations as well as higher-J pn interactions in nuclei when protons and neutrons occupy the same shell. While these correlations manifest themselves most clearly in the binding energies of 0+ ground states, they also have a large effect …
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Effective interactions and pairing correlations: from nuclei to compact stars
… responsible for the superfluid phenomena: the pairing correlations. Our goal is therefore to examine the interplay of these correlations with the other terms of the effective interaction, usually introduced to approach the nuclear many-body problem. Wide attention is dedicated to the role of …
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Transport and thermodynamic studies of the superconductors A3T4Sn13 and YFe2Ge2
… is believed to be phonon-mediated with s-wave pairing symmetry, an unusual second-order structural transition makes this material family fascinating to study. Whether this structural transition is a result of three distortions with perpendicular wavevectors resulting in a cubic-to-cubic …
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Probing nano-scale atomic and electronic structures of iron-based superconductors
… from the cuprates, including a different pairing symmetry, coexistence of superconducting and magnetic ordering, and emergence of superconductivity by isovalent doping. The iron-based high-Tc superconductors belong to the structure families of chalcogenides and pnictides. Crystal …
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Probing the superconducting order parameter of Iron-based superconductors through the Josephson effect
… the use of the Josephson effect to probe the symmetry of the superconducting order parameter of Co-doped Ba(FeAs)2 crystals (Ba122). This measurements were carried out to test the validity of the s± model, which predicts the pairing in the multiband Ba122 compounds being mediated by the …
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Topological insulators and semimetals in the presence of interactions
… investigate the unconventional superconducting pairing symmetry that may occur in the 3D TI-superconductor proximity coupled system. In the presence of the in-plane Zeeman effect to the TI surface, we find that Fulde-Ferrell(FF) state can be induced in the conventional superconductor. This …