Hosting One-Dimensional Topological States with Dislocations
Abstract
For decades, dislocations and other defects have been considered detrimental for electronic and optoelectronic devices. However, with the latest advances in theories for topological states of matter, and the development of precise methods to control the densities and configurations of dislocations, the possibility for a new frontier has emerged, in which dislocations are predicted to host 1D quantum conducting states with full spin-momentum locking. Thus, we propose a synergistic computational-experimental approach aiming to understand and control 1D topological states associated with dislocations, thereby opening a new frontier in condensed matter research and education. This project will lead to the discovery of new fundamental knowledge about topological modes hosted by dislocations, and the novel quantum states that emerge from their networks and arrays. By controlling and manipulating the density and types of dislocations, we will explore systems that offer unprecedented physical properties, such as scattering-free ballistic transport, 100percent spin pumping efficiency, 2D novel quantum matter via moire dislocation arrays, and non-Abelian Majorana modes. Our study will provide key physical parameters that govern these topological modes, such as their confinement lengths and Luttinger parameters. Through combined theoretical, computational, and experimental efforts, the study will also reveal novel physical properties of dislocation-related topological modes, such as the impact of dislocation-line curvature and dislocation interactions on the transport coefficients. Impact on DoD Capabilities- The 1D topological modes to be explored in this MURI project will revolutionize DoD capabilities. Dramatically enhanced spin-pumping efficiency can greatly improve spintronic devices, which are a key component of future information technology. In addition, Majorana modes are a key ingredient of topological quantum computing, and thus open a new pathway towards large-scale quantum computing with zero or reduced quantum error-decoherence. In contrast to conventional computer chips, where the circuits are mostly confined to a 2D plane, dislocation line modes with lossless ballistic transport offer a new opportunity to convey electrical signals in 3D space, breaking the interconnect bottleneck of current computer chip technology.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 06, 2024
- Source ID
- FA95502310334
Entities
People
- Rachel S. Goldman
Organizations
- Air Force Office of Scientific Research
- Board of Regents of the University of Michigan
- United States Air Force