Studies of unconventional superconductivity

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Abstract/Contents

Abstract: The physics of unconventional superconductors has been studied for decades but is still not well understood. The present thesis consists of two parts, each intended to shed light on some aspects of this long-standing problem. In the first part, I discuss, based on the Hubbard model in the weak-coupling limit, how the repulsion between electrons gives rise to Cooper pairing. I present simple rules that connect the features of the band structure to those of the gap function, as well as detailed numerical results for various model systems. In the second part, I focus on symmetry constraints on light reflection; a precise understanding of this issue is essential for identifying broken symmetries in various unconventional superconductors from polar Kerr effect measurements. Using a Green's function approach, I prove that the Onsager symmetry of the nonlocal electromagnetic response function implies the absence of the polar Kerr effect in backscattering.

Type of resource	text
Form	electronic; electronic resource; remote
Extent	1 online resource.
Publication date	2016
Issuance	monographic
Language	English

Associated with	Cho, Weejee
Associated with	Stanford University, Department of Physics.
Primary advisor	Kivelson, Steven
Thesis advisor	Kivelson, Steven
Thesis advisor	Kapitulnik, Aharon
Thesis advisor	Raghu, Srinivas, 1978-
Advisor	Kapitulnik, Aharon
Advisor	Raghu, Srinivas, 1978-

Genre	Theses

Statement of responsibility	Weejee Cho.
Note	Submitted to the Department of Physics.
Thesis	Thesis (Ph.D.)--Stanford University, 2016.
Location	electronic resource

License: This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).

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