Theoretical Modeling of Josephson Junctions for Digital Electronics
Abstract
This is the final technical report for James Freericks' ONR superconducting electronics grant for the period from 1999-2005. This work involved the development of computer modeling codes to describe Josephson junctions with barrier materials that are tuned close to the metal-insulator transition. The figure of merit can be determined as a function of different parameters, including the proximity to the metal-insulator transition, the thickness of the barrier, and the temperature. We discovered a simple phenomenological parameter, called the generalized Thouless energy, that is useful for characterizing and summarizing the Josephson junction properties; much behavior of these systems becomes universal when represented in terms of this Thouless energy. We also developed a nonequilibrium many-body formalism that can determine the response of these systems to large electric fields. Much of the computational work was carried out on DOD parallel machines from the HPCMO facilities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 29, 2005
- Accession Number
- ADA441153
Entities
People
- James K. Freericks
Organizations
- Georgetown University