Electronic and Magnetic Excitations in Correlated and Topological Materials

This thesis reports a major breakthrough in discovering the superconducting mechanism in CeCoIn₅, the "hydrogen atom" among heavy fermion compounds. By developing a novel theoretical formalism, the study described herein succeeded in extracting the crucial missing element of superconducting pairing interaction from scanning tunneling spectroscopy experiments. This breakthrough provides a theoretical explanation for a series of puzzling experimental observations, demonstrating that strong magnetic interactions provide the quantum glue for unconventional superconductivity. Additional insight into the complex properties of strongly correlated and topological materials was provided by investigating their non-equilibrium charge and spin transport properties. The findings demonstrate that the interplay of magnetism and disorder with strong correlations or topology leads to complex and novel behavior that can be exploited to create the next generation of spin electronics and quantum computing devices.

List of contents

Introduction.- Superconducting Gap in CeCoIn 5 .- Pairing Mechanism in CeCoIn 5 .- Real and Momentum Space Probes in CeCoIn 5 : Defect States in Differential Conductance and Neutron Scattering Spin Resonance.- Transport in Nanoscale Kondo Lattices.- Charge and Spin Currents in Nanoscale Topological Insulators.- Conclusions.- Appendix: Keldysh Formalism for Transport.

About the author

John Van Dyke is a postdoctoral researcher at the University of Iowa. He obtained his PhD from the University of Illinois, Chicago.

Summary

Nominated as an outstanding Ph.D. thesis by the University of Illinois, Chicago
Provides a theoretical explanation for a series of puzzling experimental observations around unconventional superconductivity

Develops a novel theoretical formalism for extracting the superconducting pairing interaction from scanning tunneling spectroscopy experiments
Offers readers insight into the possibilities for the next generation of spin electronics and quantum computing devices

Product details

• Authors: John S. van Dyke, John S Van Dyke, John S. Van Dyke
• Publisher: Springer, Berlin
• Languages: English
• Product format: Hardback
• Released: 01.01.2018
• EAN: 9783319899374
• ISBN: 978-3-31-989937-4
• No. of pages: 102
• Dimensions: 155 mm x 13 mm x 240 mm
• Weight: 291 g
• Illustrations: XII, 102 p. 72 illus., 69 illus. in color.
• Series: Springer Theses; Springer Theses
• Subjects: Natural sciences, medicine, IT, technology > Technology > Mechanical engineering, production engineering; B, Microscopy, spectroscopy, Spectroscopy and Microscopy, Quantum physics (quantum mechanics & quantum field theory), Nanotechnology, Physics and Astronomy, Nanoscale Science and Technology, Nanostructures, Nanoscale science, Nanophysics, Nanoscience, Spectrum analysis, spectrochemistry, mass spectrometry, Scientific equipment, experiments & techniques, Quantum computers, Strongly Correlated Systems, Superconductivity, Superconductivity, Superconductors, Spintronics, Quantum Information Technology, Spintronics