Date of Graduation
5-2022
Document Type
Dissertation
Degree Name
Doctor of Philosophy in Materials Science & Engineering (PhD)
Degree Level
Graduate
Department
Materials Science & Engineering
Advisor/Mentor
Hu, Jin
Committee Member
Churchill, Hugh O.H.
Second Committee Member
Yu, Shui-Qing "Fisher"
Third Committee Member
Barraza-Lopez, Salvador
Fourth Committee Member
Leftwich, Matthew B.
Keywords
Condensed matter physics; Magnetic topological semimetals; Quantum materials
Abstract
The demand for energy-efficient devices has been growing rapidly due to the need for data-driven technologies and the global energy crisis. As device size approaches the atomic scale, the miniaturization of electronic devices may stop in the near future unless fundamentally new materials or device concepts are developed. The emergent topological materials with exotic properties show remarkable robustness against crystal lattice defects, which are promising for next-generation technology. These materials host exotic properties such as high mobility, large magnetoresistance, chiral anomaly, and surface Fermi arcs, etc. Among various topological materials, the ZrSiS-family materials exhibit two types of Dirac states, which provide opportunities to tune topological states by varying different parameters. The magnetic version of ZrSiS-family compounds, LnSbTe (Ln = lanthanide), hosts inherent magnetism, providing a novel platform to study the interplay between magnetism and exotic quantum states.With this motivation, this research is focused on the synthesis of single-crystal and characterization of previously unexplored magnetic topological nodal line semimetals LnSbTe. The compounds NdSbTe and SmSbTe exhibit antiferromagnetic ground states and enhanced electronic correlations. The magnetization and heat capacity measurements suggest the possible existence of magnetic frustration in tetragonally crystallized SmSbTe. Furthermore, the evolution of electronic and magnetic properties was studied with varying composition.
Citation
Pandey, K. (2022). Crystal Growth and Property Tuning of Layered Magnetic Topological Semimetals. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/4457
Included in
Condensed Matter Physics Commons, Engineering Mechanics Commons, Quantum Physics Commons
