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Showing 1 to 20 of 459 for “"Superconductors"”.
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Topics in Cuprate Superconductors
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-12T21:45:42Z No. of bitstreams: 1 2000_shieh.pdf: 9177080 bytes, checksum: c98e1c23c8c10d32a0c2e391c23c857b (MD5)
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Topological semimetals and nodal superconductors
… such as topological semimetals and nodal superconductors. We systematically study these gapless topological phases described by the Bloch and Bogoliubov-de Gennes Hamiltonians. We discuss a generalized bulk-boundary correspondence, which relates the topological properties in the bulk of …
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Nuclear Spin Relaxation in Superconductors
Made available in DSpace on 2015-05-12T17:12:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0023333.PDF: 4251898 bytes, checksum: 249c87505e6abccedb501d25ad3e7396 (MD5) Previous issue date: 1957
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Current flow in inhomogeneous superconductors
"The change of normal current flow into supercurrent flow is examined in a number of problems in which the pair potential of the superconductor can vary spatially. We examine approximate solutions to the Bogoliubov equations in the limits that the pair potential, ~('f), varies quickly or slowly …
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Transport properties of anisotropic superconductors
In some heavy-fermion compounds (UPt3, and UBe13 under pressure) the normal state transport properties at low temperatures behave qualitatively as one would expect if electron-impurity interactions were the dominant source of scattering. The experimental data on ultrasonic attenuation and thermal …
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Non-linear conduction in superconductors
… field dependence of the surface impedance of superconductors, with particular reference to tin. In chapter 1 the predictions of the simple theory for the behaviour of the surface impedance for different frequencies and fieid configurations are described and compared with the results of …
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A study of holographic superconductors
… is investigated more extensively for s-wave superconductors. We consider a gravitational theory with a black hole solution in anti de Sitter spacetime, coupled to an Abelian-Higgs system in (d + 1)-dimensions. A wide range of negative mass squared for the scalar field that satisfied the …
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Orbital order in iron-based superconductors
… and the magnetic transitions in the iron-based superconductors. We will discuss this orbital order in the framework of the local-itinerant dichotomy. First, due to the spatial anisotropy of the occupied orbitals that form the local moments, the magnetic exchange constants acquire dramatically …
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Doping In high temperature cuprate superconductors
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-26T21:35:41Z No. of bitstreams: 1 Oh_Seongshik.pdf: 5610417 bytes, checksum: 2a18c3466c004f848f4a3765f4d542f0 (MD5)
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Penetration Depth Studies of Unconventional Superconductors
… penetration depth λ of various unconventional superconductors have been measured down to ~0.1 K using a tunnel-diode based, self-inductive technique at 21 and 28 MHz. The samples measured are the heavy-fermion superconductors CeCoIn5 and PrOs4Sb12, the rare-earth borocarbides RENi2B2C (RE = Y, …
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Elementary excitations in heavy-fermion superconductors
… of the elementary excitations in heavy-fermion superconductors, under the hypothesis 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 …
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Penetration depth measurements of organic superconductors
… that these samples are robust dirty d-wave superconductors like their undeuterated counterpart. With abnormally large penetration depths resulting from traditional analysis, an aluminum plating technique was used to measure the absolute penetration depth of deuterated κ-(ET)2Cu[N(CN)2]Br. …
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Higher order topological semimetals and superconductors
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Thermal conductivity of superconductors below 1K
The thermal conductivity of a metal is dependent on many parameters, and this is particularly true of a superconductor. Only a few of these parameters can be systematically varied in an investigation occupying a finite time. For that reason, this dissertation lays no claim to completness, and as …
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Applications of Pulse-Magnetised Bulk Superconductors
… and microscopic examination of matter. Superconductors have proved to be the most economical form of generating magnetic fields when strong magnetic fields are required. In recent times, the (RE)BaCu3O(7-δ) [(RE)BCO] class of high-temperature superconductors in bulk form have been shown …
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Modeling superconductors using surface impedance techniques
… simulators to model the behavior of superconductors over a wide range of frequencies. This simulation method can be applied to metals both in the normal and superconducting state and is based on calculating surface impedance as a function of temperature, frequency and material …
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Electrical characterization of thick film superconductors
… ago are now being realized. These new uses of superconductors will take place in electronics and energy systems where many different materials are used together. If these superconducting materials are to be used successfully, they must be characterized. Film quality was characterized by …
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