(MURI) HIGH TEMPERATURE, SCALABLE FLAT BANDS
Abstract
Flat band electronic systems have reemerged as a topic of interest due to progress in their physical realization and continued theoretical developments, including those suggesting their role as hosts of correlated topological states. While van der Waals heterostructures have been shown to host moire lattices that support flat band-driven magnetism, superconductivity, and topologically nontrivial states at large length scales and low energy scales, this proposal addresses the question of whether such behavior can also be realized in crystalline systems and epitaxial heterostructures, where higher energy scales associated with the atomic lattice and advanced material control provide more robust and scalable platforms for their exotic phenomena. We propose an integrated theory, computation, synthesis, and advanced characterization campaign to realize such high temperature, scalable flat band systems. Theoretical methods focus on advancing beyond traditional, and often overly simplified, density functional theory techniques to predict and capture the emergent behavior of flat band systems. Coupled to these theoretical advances and their resulting predictions will be a close feedback loop comprised of the rapid experimental synthesis of a wide arrange of bulk single crystal and thin film material candidates via variety of techniques and a broad set of characterization techniques employed to capture the spectroscopic, transport, structural, and thermodynamic properties of their resulting flat electronic bands. This integrated theory, computation, growth, and characterization loop will be leveraged both for the generation of entirely new classes and structure types of flat band materials, and seeding this effort are a multitude of promising flat band candidate systems already identified and developed by the team.The anticipated results are the identification and realization of a select group of new hightemperature, scalable flat band materials which realize robust correlated and topological phases.These will be of immediate relevance for DoD goals of development of topological electronicdevices and device structures with enhanced thermoelectric capabilities.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210432
Entities
People
- Joseph Checkelsky
Organizations
- Air Force Office of Scientific Research
- Massachusetts Institute of Technology
- United States Air Force