Development and characterization of GNR/LaAIO3/SrTiO3 nanostructures for future quantum information applications
Abstract
Title: Development and characterization of GNR/LaAIO3/SrTiO3 nanostructures for future quantum information applicationsThe Second Quantum Revolution promises to take advantage of quantum coherence and entanglement in quantum materials to enable quantum computation, quantum simulation, secure communications, and speedup of important mathematical and optimization problems. Qubits, thetwo-state building blocks of quantum computers, have been demonstrated in several material platforms, many of which are based on solid-state materials. Graphene nanoribbons (GNRs) combine the molecular-scale precision of single dopants or atomic-scale defects with a wide range of charge, spin, and topological degrees of freedom. We propose to develop a foundation for usingGNRs in quantum information applications, by taking advantage of their unique chemically synthesizable degrees of freedom and combining them with a unique complex-oxide nanolithography platform. The LaAlO3/SrTiO3-based nanoelectronics platform pioneered by Levy can provide many avenues for meeting the challenges of developing quantum information applications that are based on GNRs. The LaAlO3/SrTiO3 system offers extreme nanoscale controlover the metal-insulator transition and possesses remarkable properties that are well suited to the characterization and manipulation of single GNRs. At room temperatures, the conductive properties of the LaAlO3/SrTiO3 system can be manipulated with 2 nm precision. We will focus on performing key experiments that would help build quantum information applications using GNRs The research proposed here focuses on two main objectives: (1) electrical characterization of single GNRs, in order to search for charge/spin/topological phases that can be used to store and manipulate quantum information, and (2) THz spectroscopy of single GNRs in order to help characterize them in complementary ways not possible through DC transport. We propose toincorporate single GNRs into mesoscopic devices formed from LaAlO3/SrTiO3 nanostructures. Well-established mesoscopic transport techniques will be used to probe charge and spin states of single GNRs as a function of magnetic and/or electric fields. Transport experiments will be performed at low temperatures (using a dilution refrigerator) and with applied magnetic fields up to 20 Tesla.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012481
Entities
People
- Jeremy Levy
Organizations
- Office of Naval Research
- United States Navy
- University of Pittsburgh