Event Title

Modeling current flow in nanoparticle doped polymer film systems

Co-Author(s)

David Seaman, Joshua Spradlin, Kyle Young, Janelle Leger, Armin Rahmani

Research Mentor(s)

Armin Rahmani

Description

Nanoparticle-doped polymer systems have elicited great interest for their ability to exhibit an electrical hysteresis, which can be applied to bistable organic memory devices. Such hysteresis is characterized by the ability maintain different currents at the same voltage, upon increasing and decreasing the voltage. Developing a successful theoretical and computational model for this effect could provide insights into what mechanisms are driving the hysteresis. However, while there has been interest in these systems for two decades, there are still open questions regarding modeling their operation mechanism. In this work, we explore a method of modelling these systems that approximates the electrodes in the system as finite chains connected to an interconnected system of polymer chains. We then develop the current operator between a junction between an electrode and the system in the Heisenberg picture. We have obtained preliminary results on the I-V curve of the model, and extensions are underway to improve agreement with experimental results.

Document Type

Event

Start Date

May 2018

End Date

May 2018

Location

Physics and Astronomy

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.

Language

English

Format

application/pdf

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May 16th, 12:00 PM May 16th, 3:00 PM

Modeling current flow in nanoparticle doped polymer film systems

Physics and Astronomy

Nanoparticle-doped polymer systems have elicited great interest for their ability to exhibit an electrical hysteresis, which can be applied to bistable organic memory devices. Such hysteresis is characterized by the ability maintain different currents at the same voltage, upon increasing and decreasing the voltage. Developing a successful theoretical and computational model for this effect could provide insights into what mechanisms are driving the hysteresis. However, while there has been interest in these systems for two decades, there are still open questions regarding modeling their operation mechanism. In this work, we explore a method of modelling these systems that approximates the electrodes in the system as finite chains connected to an interconnected system of polymer chains. We then develop the current operator between a junction between an electrode and the system in the Heisenberg picture. We have obtained preliminary results on the I-V curve of the model, and extensions are underway to improve agreement with experimental results.