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Electronic and magentic excitations in correlated and topological materials

Author: John S Van Dyke
Publisher: Cham : Springer, 2018.
Series: Springer theses.
Edition/Format:   eBook : Document : EnglishView all editions and formats
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  Read more...
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Genre/Form: Electronic books
Additional Physical Format: Print version:
(OCoLC)1029205693
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: John S Van Dyke
ISBN: 9783319899381 3319899384
OCLC Number: 1036734953
Notes: "Doctoral thesis accepted by University of Illinois at Chicago, Chicago, Illinois, USA."
Description: 1 online resource
Contents: 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.
Series Title: Springer theses.
Responsibility: John S. Van Dyke.

Abstract:

This breakthrough provides a theoretical explanation for a series of puzzling experimental observations, demonstrating that strong magnetic interactions provide the quantum glue for unconventional  Read more...

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