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Local tunneling characteristics near a grain boundary of a d-wave superconductor as probed by a normal-metal or a low-Tc-superconductor STM tipZhao, Hongwei 29 August 2005 (has links)
We studied the local single-particle tunneling characteristics [as observed with scanning
tunnel microscopy (STM)] for N D and S D tunneling, where N is a normal
metal, S is a s-wave superconductor, and D is a d-wave superconductor with
a {100} | {110} grain boundary. The tunneling Hamiltonian method was used. The
self-consistent order parameter is first determined using the quasiclassical Green'sfunction
method, and then the tunneling characteristics at various distances from
the interface, reectivity of the interface, and temperature are studied. For N D
tunneling, a zero-bias conductance peak (ZBCP) occurs near the interface with diminishing
magnitude away from it. For S D tunneling, the ZBCP splits to exhibit
the gap of the s-wave low-Tc superconducting tunneling tip and there is a range of
negative conductance just outside the peaks when the tunneling point is near the
grain boundary. The results are compared with those obtained by using a constant
order parameter in each grain.
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Vortex physics of unconventional superconductors Ginzburg-Lindau theory /Li, Qunqing. January 2000 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 109-120).
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I. Molecular simulations of buckyball fullerenes. II. Quantum chemistry studies on high-Tc superconductorsGuo, Yuejin. Goddard, William A., January 1900 (has links)
Thesis (Ph. D.)--California Institute of Technology, 1992. UM #92-32, 184. / Advisor names found in the Acknowledgments pages of the thesis. Title from home page. Viewed 02/01/2010. Includes bibliographical references.
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Supercurrents across unconventional superconducting junctions /Wang, Linli. January 2001 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 102-107).
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Physical applications of the excitonic enhancement model to superconducting systems楊漢賢, Yeung, Hon-yin. January 1992 (has links)
The Best M.Phil Thesis in the Faculties of Dentistry, Engineering, Medicine and Science (University of Hong Kong), Li Ka Shing Prize,1991-1993 / published_or_final_version / Physics / Master / Master of Philosophy
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Supercurrents across unconventional superconducting junctions汪琳力, Wang, Linli. January 2001 (has links)
published_or_final_version / Physics / Master / Master of Philosophy
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Superconductivity and non-homogeneous magnetismWitt, James David Samuel January 2012 (has links)
No description available.
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Fermi surface and lattice instabilities, and their consequences for superconductivityKlintberg, Lina Esther January 2012 (has links)
No description available.
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Effect of temperature on the crystal structure of lanthanum, cerium, neodymium, and paraseodymium The relation between crystal structure and superconductivityFloyd, Acey LeeRoy 08 1900 (has links)
No description available.
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Phenomenological realism, superconductivity and quantum mechanicsShomar, Towfic Louis Elias January 1998 (has links)
The central aim of this thesis is to present a new kind of realism that is driven not from the traditional realism/anti-realism debate but from the practice of physicists. The usual debate focuses on discussions about the truth of theories and how they relate with nature, while the real practices of the scientists are forgotten. The position I shall defend is called "phenomenological realism". The realist doctrine was recently undermined by the argument from pessimistic meta-induction, also known as the argument from scientific revolutions. I argue that phenomenological realism is a new kind of scientific realism that can overcome the problem generated by the pessimistic meta-induction, and which reflects scientific practice. The realist has tried to overcome the pessimistic meta-induction by suggesting various types of theory dichotomy. I claim that the different types of dichotomy normally presented by realists do not overcome the problem, for these dichotomies cut through theory vertically. I argue for a different kind of dichotomy, one that cuts horizontally, between high-level and low-level theoretical representations. I claim that theoretical forms in physics have two distinct types depending on the way they are built. These are theoretical models that are built depending on a top-down approach and phenomenological models that are built depending on a bottom-up approach. I argue that for the most part only phenomenological models are the vehicles of accurate representation. I present two case studies. The first case study is from superconductivity, where I contrast the BCS model of superconductivity with the phenomenological model of Landau and Ginzburg. The other case study is a fresh look at the Bohr-Einstein debate.
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