Two-Dimensional Superconductivity in Rare Earth Oxybismuthides with Unusual Valent Bismuth Square Net

✍ Scribed by Ryosuke Sei

• Publisher: Springer
• Year: 2023
• Tongue: English
• Leaves: 124
• Series: Springer Theses
• Edition: 1
• Category: Library

✦ Table of Contents

Supervisor’s Foreword
Acknowledgements
Contents
1 General Introduction
1.1 Layered Superconductors
1.1.1 High-Temperature Superconductors
1.1.2 Two-Dimensional Superconductivity
1.1.3 Complex Phase Diagram
1.1.4 Schemes to Search Novel Layered Superconductors
1.1.5 Superconductivity in Strong Spin–Orbit Coupled System
1.2 Bi Square Net Compounds
1.2.1 Crystal Structure
1.2.2 Anisotropic Dirac Fermion in Bi Square Net Compounds
1.2.3 Kondo Lattice Behavior in CeMBiSubscript 22
1.2.4 Potential for Superconducting Bi Square Net
1.2.5 Physical Properties of RSubscript 22OSubscript 22Bi (R: rare earth)
1.3 Purpose of This Study
References
2 Experimental Techniques
2.1 Sample Preparation
2.1.1 Pulsed Laser Deposition
2.1.2 Sputtering
2.1.3 Vacuum Sealing
2.2 Crystallographic Characterization
2.2.1 X-Ray Diffraction
2.2.2 Rietveld Refinement
2.2.3 Atomic Force Microscope
2.3 Composition Analysis
2.3.1 X-Ray Photoemission Spectroscopy
2.3.2 Electron Probe Microanalyzer
2.3.3 Inductively Coupled Plasma Mass Spectrometry
2.4 Magnetic Measurements
2.5 Electrical Measurements
2.5.1 Four-Probe Method
2.5.2 Hall Measurement
2.5.3 Measurement Configuration
2.6 Specific Heat Measurements
2.6.1 Thermal Relaxation Method
2.6.2 Dilution Refrigerator
References
3 Development of Solid-Phase Epitaxy Techniques
3.1 Introduction
3.2 Development of Reductive Solid-Phase Epitaxy
3.2.1 Experimental
3.2.2 Fabrication Results
3.2.3 Reaction Mechanism
3.2.4 Drawbacks of Reductive Solid-Phase Epitaxy
3.3 Development of Multilayer Solid-Phase Epitaxy
3.3.1 Experimental
3.3.2 Crystal Structure and Valence State of Bi
3.3.3 Electronic Transport Properties
3.3.4 Onset of Superconductivity
3.4 Conclusion
References
4 Two-Dimensional Superconductivity in Polycrystalline Y2O2Bi
4.1 Introduction
4.2 Experimental
4.3 Crystal Structure
4.4 Emergence of Bulk Superconductivity
4.4.1 Magnetic Properties
4.4.2 Electrical Transport Properties and Two-Dimensional Superconductivity
4.4.3 Specific Heat Measurement
4.5 Mechanism of Superconductivity
4.6 Possible Homologous Series upper Y Subscript n Baseline upper O Subscript n Baseline upper F Subscript n minus 2 Baseline BiYnOnFn-2Bi with Higher Tc
4.7 Conclusion
References
5 Unusual Superconductivity in Tb Subscript 2 Baseline upper O Subscript 2 Baseline BiTb2O2Bi
5.1 Introduction
5.2 Properties of Pristine Tb2O2Bi
5.2.1 Experimental
5.2.2 Crystal Structure
5.2.3 Physical Properties
5.3 Structural Control of Tb2O2Bi
5.3.1 Experimental
5.3.2 Crystal Structure
5.3.3 Physical Properties of F Doped Tb2O2Bi
5.3.4 Physical Properties of O Incorporated Tb2O2Bi
5.3.5 Complex Phase Diagram
5.4 Conclusion
References
6 Universal Superconductivity in italic upper R Subscript 2 Baseline upper O Subscript 2 Baseline BiR2O2Bi
6.1 Introduction
6.2 Experimental
6.3 Results and Discussion
6.4 Conclusion
References
7 General Conclusion
Appendix A Post-Growth of Superconducting Y2O2Bi
A.1 Introduction
A.2 Experimental
A.3 Results and Discussion
A.4 Conclusion
Appendix B Synthesis of Polycrystalline Dy2O2Bi
B.1 Introduction
B.2 Experimental
B.3 Results and Discussion for Pristine Dy2O2Bi
B.4 Results and Discussion for F doped Dy2O2Bi
B.5 Results and Discussion for O Incorporated Dy2O2Bi
B.6 Conclusion
Appendix C Synthesis of Polycrystalline Lu2O2Bi
C.1 Introduction
C.2 Experimental
C.3 Results and Discussion
C.4 Conclusion
Appendix D Fabrication of Dy2O2Bi Thin Film
D.1 Experimental
D.2 Crystal Structure
D.3 Physical Properties
D.4 Conclusion