Electronic and magentic excitations in correlated and topological materials / John S. Van Dyke.
Van Dyke, John S.
2018
TK7872.S8
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Title Electronic and magentic excitations in correlated and topological materials / John S. Van Dyke.
Author Van Dyke, John S.
ISBN 9783319899381 (electronic book)
3319899384 (electronic book)
9783319899374
3319899376
DOI https://doi.org/10.1007/978-3-319-89938-1
Publication Details Cham : Springer, 2018.
Language English
Description 1 online resource.
Item Number 10.1007/978-3-319-89938-1 doi
Call Number TK7872.S8
Dewey Decimal Classification 621.3/5
Summary 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.
Note "Doctoral thesis accepted by University of Illinois at Chicago, Chicago, Illinois, USA."
Bibliography, etc. Note Includes bibliographical references.
Access Note Access limited to authorized users.
Digital File Characteristics text file PDF
Source of Description Description based on print version record.
Series Springer theses.
Available in Other Form Print version: 9783319899374
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Intro; Supervisor's Foreword; Contents; Published Results and Contribution of Authors; 1 Introduction; 1.1 Correlations in Condensed Matter; 1.2 Topological Materials; References; 2 Superconducting Gap in CeCoIn5; 2.1 Superconducting Gap Symmetry; 2.2 Basics of Scanning Tunneling and Quasiparticle Interference Spectroscopy; 2.3 Experimental Challenge of QPI for CeCoIn5; 2.4 Theoretical Model for CeCoIn5 Band Structure; 2.5 Theory of Heavy Fermion QPI; 2.6 CeCoIn5 QPI at Large Energies; 2.7 CeCoIn5 QPI at Small Energies; References; 3 Pairing Mechanism in CeCoIn5

3.1 Heavy Fermion Superconductivity3.2 Extraction of the Magnetic Interaction; 3.3 Phase-Sensitive QPI; 3.4 Spin Excitations in CeCoIn5; 3.4.1 Magnetic Resonance Peak; 3.4.2 NMR Spin-Lattice Relaxation Rate; References; 4 Real and Momentum Space Probes in CeCoIn5: Defect States in Differential Conductance and Neutron Scattering Spin Resonance; 4.1 Real-Space Study of Defects by STM; 4.1.1 Model; 4.2 Neutron Scattering in CeCoIn5; 4.2.1 Magnetic Anisotropy and External Magnetic Field; References; 5 Transport in Nanoscale Kondo Lattices; 5.1 Transport in a Clean System

5.2 Transport with Defects5.3 Multiple Defects; 5.4 Hopping Within the f-Band; 5.5 Self-Consistency with Finite Bias; References; 6 Charge and Spin Currents in Nanoscale Topological Insulators; 6.1 Introduction; 6.2 Model; 6.3 Polarized Spin Currents; 6.4 Non-magnetic Defects; 6.5 Magnetic Defects; 6.5.1 Ising-Type Magnetic Defects; 6.5.2 Spin-Flip-Type Magnetic Defects; 6.6 Heisenberg Defects and Spin Diodes; 6.7 Interface with Ferro- and Antiferromagnets; 6.8 Robustness of the Spin-Polarized Currents; References; 7 Conclusion; References; Appendix A Keldysh Formalism for Transport

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