Sign reversal of magnetoresistance and inverse spin Hall effect in doped conducting polymers
| Autor: | Christoph Boehme, Kipp J. van Schooten, Chuang Zhang, Dali Sun, Reghu Menon, Yaxin Zhai, Matthew Groesbeck, Z. Valy Vardeny, Marzieh Kavand, Hans Malissa |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Conductive polymer Materials science Condensed matter physics Dopant Magnetoresistance Doping 02 engineering and technology Polymer Conductivity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science PEDOT:PSS chemistry Condensed Matter::Superconductivity 0103 physical sciences Spin Hall effect Condensed Matter::Strongly Correlated Electrons General Materials Science 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of physics. Condensed matter : an Institute of Physics journal. 30(48) |
| ISSN: | 1361-648X |
| Popis: | Conducting polymers, where pristine polymers are doped by active dopants, have been used in a variety of flexible optoelectronic device applications due to their tunable conductivity values. Charge transport in these materials has been intensively studied for over three decades. However, spin transport properties in these compounds have remained elusive. Here, we studied two polaron-dominated and trap-dominated spin transport processes in two types of PEDOT:PSS polymers that are lightly and heavily doped, respectively. Using pulsed spin-pumping and spin-injection techniques, we found the sign of inverse spin Hall effect and magnetoresistance obtained from the lightly doped PEDOT:PSS film can reverse its polarity as a function of temperature and applied bias, in contrast to that in the heavily doped PEDOT:PSS film. Our work provides an alternative approach for studying the spin transport in conducting polymer films. |
| Databáze: | OpenAIRE |
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