Electrically Controlled Dimensionality of Magnetic Systems in Organic Materials
- Authors: Sakurai Y.1, Matsumoto D.1, Marumoto K.1,2
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Affiliations:
- Division of Materials Science, University of Tsukuba
- Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba
- Issue: Vol 49, No 8 (2018)
- Pages: 767-782
- Section: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/248072
- DOI: https://doi.org/10.1007/s00723-018-1005-2
- ID: 248072
Cite item
Abstract
Electrically controlling charge density in materials using electronic device structures shows various interesting phenomena, such as electrically induced ferromagnetism and superconductivity, owing to strong charge interactions. However, electrically controlled dimensionality of magnetic systems has not yet been fully investigated. Here we report electrically controlled magnetic interactions and dimensionality of magnetic systems in organic materials from a microscopic viewpoint, which were revealed by electron spin resonance (ESR) spectroscopy using ionic liquid-gated devices. The ESR investigation demonstrated that the magnetic systems’ dimensionality of electrically accumulated charges varied from zero dimensional to two dimensional in a regioregular polymer, regioregular poly(3-hexylthiophene) (RR-P3HT), by increasing charge densities. This phenomenon is in contrast to those in a small molecule pentacene and a regiorandom polymer, regiorandom poly(3-hexylthiophene) (RRa-P3HT), where it varied from zero to three dimensional when their charge densities increased. Moreover, the formation of the complete spinless states of electrically induced charges was observed. Our investigation demonstrates the novel magnetic systems based on electrically induced charges.
About the authors
Yuki Sakurai
Division of Materials Science, University of Tsukuba
Email: marumoto@ims.tsukuba.ac.jp
Japan, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573
Daisuke Matsumoto
Division of Materials Science, University of Tsukuba
Email: marumoto@ims.tsukuba.ac.jp
Japan, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573
Kazuhiro Marumoto
Division of Materials Science, University of Tsukuba; Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba
Author for correspondence.
Email: marumoto@ims.tsukuba.ac.jp
Japan, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573; 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8571