Work

Magneto‐Capacitance of PEDOT:PSS Thin Films; Effects of a Two‐Phase System and Coulomb Interaction

Year: 2024

Type: article

Abstract: The study of the net magneto‐capacitance, C(B), in thin films of the conducting polymer Poly(3 4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is presented. In the films there are charged electrically‐conducting PEDOT‐rich regions surrounded by PSS insulating charged material. The high‐conductivity grade PEDOT:PSS thin films are studied at low temperature, where the hopping conduction is dominant. It is experimentally observed that there is a finite net magneto‐capacitance, C(B), in the temperature range T = 1.7–3 K. Thus, the observed C(B) is a direct evidence for an intra‐site Coulomb interaction, U ≈ 2 meV, among the mobile charge carriers in the PEDOT‐rich regions. The lifting of spin degeneracy motivates PEDOT for use in spintronic applications.

Source: Advanced Electronic Materials

DOI: 10.1002/aelm.202400015

Authors: Daniel Nikiforov, Nir Tessler, Eitan Ehrenfreund

Institutions: Technion – Israel Institute of Technology, University of Utah

Language: English

Topic: Conducting polymers and applications

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,100

Funders: U.S. Department of Energy, Office of Science