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 20 of 45 for “"D-wave"”.
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Low temperature quasiparticle transport in d-wave superconductors
… the high-Tc cuprate superconductors exhibits d-wave symmetry, vanishing at four nodal points on the Fermi surface. Near each of these four gap nodes, quasiparticles are easily excited and behave more like massless relativistic particles than electrons in a metal. In this thesis, we study the …
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Interaction between vortices and impurities in a d-wave superconductor /
… between the vortex and the impurity in a d-wave superconductor.
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Stability Analysis of Krylov Subspace Spectral Methods for the 1-D Wave Equation in Inhomogeneous Media
… of a first-order KSS method applied to the wave equation in inhomogeneous media.</p>
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Verification of d-wave pairing symmetry by microwave intermodulation distortion measurements in yttrium barium copper oxide
… 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 upturn of the nonlinear …
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Elementary excitations in heavy-fermion superconductors
… that the Cooper pairs are in a relative p-wave or d-wave. First, all p-wave and d-wave states are classified in the presence of strong spin-orbit coupling and crystal fields, which are important effects in heavy-fermions. It is found that p-wave states generally have either a gap on the …
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Surface wave propagation in 3-D anelastic media
Lateral perturbations in anelasticity (Q) and wave speed together provide important constraints on thermal and chemical structures in the mantle. In present-day tomography studies of global wave speed and anelasticity, the significance of 3-D wave speed and 3-D Q structures on surface wave travel …
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Semiclassical approaches to Quantal Andreev Billiards and Other Topics in Inhomogeneous Superconductivity
… framework for the investigation of the short-wave quantal properties of quasiparticles in Andreev billiards is developed. Among the central results are two semiclassical trace formulas for the density of states. The first, a lower-resolution formula, corresponds to the well-known …
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Evolution of the excitation spectrum of cuprate superconductors with doping and temperature
Understanding the mechanism by which d-wave superconductivity in the cuprates emerges and is optimized by doping a Mott insulator is one of the major outstanding problems in physics. A key unresolved question in this field is how the strength of electron pairing evolves as a function of doping and …
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Quantum simulations on square and triangular Hubbard models
… physics, a superconducting dome composed of d-wave pairings has been identified experimentally. We study the Hubbard model on square lattices and _x001C_find that the pairing strength is originated from anti-ferromagnetic instabilities, and the nearly nested Fermi surface with the square …
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Josephson Interferometry Measurements in High-T(c) Grain Boundary Junctions
… Andreev reflection at the (110) surface in d-wave superconductors leads to the formation of zero-energy quasiparticle surface states. It is predicted that these surface states lead to a suppression of the d-wave order parameter and formation of a subdominant pairing phase with a complex order …
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Josephson Interferometry Measurements in High-Tc Grain Boundary Junctions
… Andreev reflection at the (110) surface in d-wave superconductors leads to the formation of zero-energy quasiparticle surface states. It is predicted that these surface states lead to a suppression of the d-wave order parameter and formation of a subdominant pairing phase with a complex order …
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MATRIX FIELD THEORY: APPLICATIONS TO SUPERCONDUCTIVITY
… to describe both clean and disordered s-wave and d-wave superconductors and the quantum phase transitions associated with them. The thesis can be divided into three parts. The first part includes chapters 1 to 3. In chapter one a general physical introduction is given. In chapters two and …
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Electron Tunneling Study of Superconductors Doped With Magnetic Atoms and Nonmagnetic Resonant State Atoms: Indium-Chromium, Zinc-Manganese, and Aluminum-Manganese
… with Shiba's theory was found if s, p, and d wave scattering were included.
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Investigations of three-dimensional optical transfer functions
… of the propagation of three-dimensional (3-D) wavefields. The knowledge of the obtainable 3-D wave structures are useful for applications such as 3-D data acquisition, material processing, radiation therapy, radiative non-invasive surgery, 3-D microscopy and robotic vision. This thesis …
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Topological Phases in Perovskite Iridates with Strong Spin-Orbit Coupling
… of a two-dimensional Weyl semimetal and a d-wave superconductor. We focused on the most promising and feasible realization: Iridium oxide layer without inversion symmetry, which is classified as Weyl semimetal, in proximity to d-wave high temperature Cuprates. In conclusion, we provide some …
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Planar Tunneling Into YBCMO (M = Zinc, Nickel) Thin Films
… order parameter of YBCO being of d-wave symmetry. The magnitude of the ABS decreases as the doping concentration is increased. In the case of Zn doped films, the ABS are quenched for the highest doping concentration used. Applied magnetic fields split the ABS, consistent with the …
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Electron tunneling study of superconductors doped with magnetic atoms and nonmagnetic resonant state atoms: Indium-chromium, zinc-manganese, and aluminum-manganese
… with Shiba's theory was found if s, p, and d wave scattering were included. The results on Al-Mn were compared with Salomaa and Nieminen's theory for nonmagnetic resonant state atoms in superconductors. The predicted band of states was not observed. Our measurements indicate that Mn in …
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Valence transition and superconductivity in the extended periodic Anderson model
… analytical and numerical results show that d- wave superconductivity becomes dominant in the valence transition regime. This confirms the suggestion by Miyake that valence fluctuations may lead to superconductivity in the Ce based heavy-fermion systems under high pressure.
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The algebraic spin liquid of a possible model description for the normal state of underdoped high temperature superconductors
… state from the perspective of both d-wave BCS and the SU(2) slave boson theory of Wen and Lee. Both approaches work well close to zero tunneling bias. The slave particle formulation however also naturally incorporates the particle/hole asymmetric background that is seen in experiments.
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Pair density wave superconducting states and statistical mechanics of dimers
… to the study of the so called pair-density-wave (PDW) superconducting state and some of its connections to electronic liquid crystal (ELC) phases, its topological aspects in a one dimensional model and its appearance in a quasi-one dimensional system. On the other hand, chapter 5 is focused …
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