Nanoelectronics with Proximitized Materials
Abstract
Title: Nanoelectronics with Proximitized MaterialsObjective:Our objective is to develop a comprehensive description of various proximity effects and explore their opportunities for nanoelectronic devices.Approach:Our approach builds on the recent experimental advances and a novel use of common materials modified through proximity effects. The intuitionabout the proximity effects is well" derived from the superconducting case, known for 85 years.Superconducting properties can leak out from a superconductor into a nei""ghboring normal regionwhich by itself would not be superconducting. Remarkably, superconducting proximity effects can attain orders" of magnitude longer lengths (> 10 mm) than for magnetic or spin-orbit coupling (SOC) proximity effects which are often neglected. T"he quest to utilize Majorana bound states (MBS) for fault-tolerant quantum computing, exemplifies the key role of proximity effects."While MBS as emergent quasiparticles with exotic non-Abelian statistics and particleantiparticle symmetry were initially sought in" native p-wave superconducting regions in a vortex core, Sr2RuO4, and Bechgaard salts, a much more promising approach is to realize" proximityinducedeffective p-wave pairing in semiconductor nanostructures.SOW:Project Milestones:Year 1: Micromagnetic modeling of various magnetic textures with in-plane and out-of-plane anisotropy for manipulating Majorana bounds states. Identifying suitable magnetic tunnel junctions for experimental realization of topological superconductivity. Formulating effective reconfigurable wires from magnetic textures. Generalized Bogoliubov-de Gennes equations thatinclude arbitrary magnetic textures in superconducting junctions. First principles studies of magnetic proximity effects and spin swithching in hBN-encapsulated grapheme.Year 2: Inclusion of orbital effects in magnetoanisotropic Andreev reflection for studies of spin triplet proximity effects. Analysis of interfacial spin-orbit coupling studies in superconducting junctions to develop an effective model that could be used for a more accurate description of Majorana bound states. Transport calculations for detection and braiding of Majorana bound states. First principles studies of proximity-modified antiferromagnet/graphene junctions.Effective models for graphene heterostructures functionalized by magnetic and spin-orbit coupling proximity effects.Year 3: Self-consistent and multi-band description of spin-orbit coupling of Bogoliubov-de Gennes equations for Majorana bound states. Systematic theoretical guidance for experimental realization of Majorana bounds states in proximity-induced superconductivity with an array of magnetic tunnel junctions. Proof-of-principle calculations of the new Hall effect in strainedgraphene by studying longitudinal and transverse response. Analysis of nonvolatile spin-logic devices in graphene/ferromagnet junctions controlled by spin switching of proximity-induced exchange splitting.Future Naval Relevance:Successful implementation of this proposal will enable developing a versatile toolkit for harnessing proximity effects in manipulating Majorana bound states as well as a new generation of nanoelectronic devices.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 01, 2017
- Source ID
- N000141712793
Entities
People
- Igor Žutić
Organizations
- Office of Naval Research
- Research Foundation for the State University of New York
- United States Navy