Quantum Transport in Tunable Nanoscale Devices at Complex Oxide Interfaces
Abstract
Title: Quantum Transport in Tunable Nanoscale Devices at Complex Oxide InterfacesObjective: To study quantum transport in novel nanoscale devices using local electrostatic gating to laterally confine 2DEG at oxide interfaces.Approach:The proposed approach wi"ll instead be applicable to a wide range of oxide interface materials and thicknesses,and will be independent of specialized scanni""ng probe techniques.SOW:1. Develop efficient, tunable electrostatic gating at complex oxide interfaces, mainly NdTiO3/SrTiO3 (NTO"/STO). We will use a few monolayers of MBE-grown STO as the top gate dielectric and achieve high gating efficiencies by taking advantage of the largedielectric constant of STO.2. Use this gating approach to investigate electronic transport in quantum point conta"cts, quantum wires and quantum dots formed at the interface.3. Study the superconducting pairing mechanism in oxide interfaces by m"eans of gate-defined structures such as superconducting quantum point contacts and tunable Josephson junctions. PI is particularly interested in testing predictions of topological superconductivity and detecting Majorana modes at the interface.Navy Relevance:Success in the proposed research will shed light on the interplay between strong electron correlations and lateral confinement and will further the development of novel electronic devices whose capabilities extend beyond current semiconductor-based systems. Oxide interfaces are extremely promising for this work because they uniquely combine strong electron-electroncorrelation effects with spin-"orbit coupling, magnetism and superconductivity. Furthermore, detecting topological superconductivity in an oxide interface could ul"timately have a transformative impact on quantum computing. This is because topological superconductors host Majorana excitations which underpin proposals for low-decoherence quantum computing. Theoutcomes of this project could therefore pave the way for creating higher efficiency electronics and computing technologies that could benefit the Navy and Marine Corps.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 29, 2017
- Source ID
- N000141712884
Entities
People
- Vlad S Pribiag
Organizations
- Office of Naval Research
- Regents of the University of Minnesota
- United States Navy