Sign reversal of magnetoresistance and inverse spin Hall effect in doped conducting polymers.
J Phys Condens Matter
; 30(48): 484003, 2018 Dec 05.
Article
en En
| MEDLINE
| ID: mdl-30418948
ABSTRACT
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 PEDOTPSS 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 PEDOTPSS film can reverse its polarity as a function of temperature and applied bias, in contrast to that in the heavily doped PEDOTPSS film. Our work provides an alternative approach for studying the spin transport in conducting polymer films.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Estados Unidos