Direct Visualization of Topological Superconducting States in the GHz Regime
Abstract
The objective of this project is to utilize high-frequency scanning probe microscopy techniques to visualize topological electronic states in quantum materials, with particular focus on two-dimensional systems that host one-dimensional chiral edge modes. During this project, we developed a state-of-the-art microwave impedance microscope (MIM) integrated into a cryogen-free dilution refrigerator, which images the local microwave response from electronic states at low temperatures below 100mK. To complement this experimental effort, we developed models that quantify the MIM response of chiral edge modes propagating at the boundary of a Chern insulator, which provide a general framework for understanding the response of topological edge modes using the technique of microwave impedance microscopy. During the final year of the project, we developed a suite of complementary scanning probe microscopy tools to both image and dynamically manipulate the twist angle of a moire crystal in-situ, which may be useful for systematically mapping the phase diagram of correlated and topological states in this family of materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 10, 2024
- Accession Number
- AD1230653
Entities
People
- Monica Allen
Organizations
- University of California, San Diego