Magneto-Capacitance of PEDOT:PSS Thin Films; Effects of a Two-Phase System and Coulomb Interaction,Advanced Electronic Materials

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Magneto-Capacitance of PEDOT:PSS Thin Films; Effects of a Two-Phase System and Coulomb Interaction
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2024-12-04 , DOI: 10.1002/aelm.202400015
Daniel Nikiforov _{1,

2} , Nir Tessler ₃ , Eitan Ehrenfreund ₁

Affiliation

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.

中文翻译：

PEDOT：PSS 薄膜的磁电容;两相系统和库仑相互作用的影响

介绍了导电聚合物聚（3 4-乙烯二氧噻吩）:p酰（苯乙烯磺酸盐）（PEDOT：PSS）薄膜中净磁电容 C（B）的研究。在薄膜中，有带电导电的富含 PEDOT 的区域，周围环绕着 PSS 绝缘带电材料。在低温下研究了高导电级 PEDOT：PSS 薄膜，其中跳跃传导占主导地位。实验观察到，在 T = 1.7–3 K 的温度范围内，存在一个有限的净磁电容 C（B）。因此，观察到的 C（B）是富含 PEDOT 区域的移动电载流子之间场内库仑相互作用 U ≈ 2 meV 的直接证据。自旋简并性的提升促使 PEDOT 用于自旋电子学应用。

更新日期：2024-12-04

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