UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Long spin diffusion lengths in doped conjugated polymers due to enhanced exchange coupling

Wang, SJ; Venkateshvaran, D; Mahani, MR; Chopra, U; McNellis, ER; Di Pietro, R; Schott, S; ... Sirringhaus, H; + view all (2019) Long spin diffusion lengths in doped conjugated polymers due to enhanced exchange coupling. Nature Electronics , 2 (3) pp. 98-107. 10.1038/s41928-019-0222-5. Green open access

[thumbnail of Cubukcu Long spin diffusion lengths in doped conjugated polymers due to enhanced exchange coupling.pdf]
Preview
Text
Cubukcu Long spin diffusion lengths in doped conjugated polymers due to enhanced exchange coupling.pdf - Accepted Version

Download (2MB) | Preview

Abstract

Carbon-based semiconductors such as conjugated organic polymers are of potential use in the development of spintronic devices and spin-based information processing. In particular, these materials offer a low spin–orbit coupling strength due to their relatively light constituent chemical elements, which should, in principle, favour long spin diffusion lengths. However, organic polymers are relatively disordered materials and typically have a carrier mobility that is orders of magnitude lower than crystalline inorganic materials. As a result, small spin diffusion lengths of around 50 nm have typically been measured using vertical organic spin valves. Here, we report measuring spin diffusion lengths in doped conjugated polymers using a lateral spin transport device architecture, which is based on spin pumping injection and inverse spin Hall detection. The approach suggests that long spin diffusion lengths of more than 1 μm and fast spin transit times of around 10 ns are possible in conjugated polymer systems when they have a sufficiently high spin density (around 1020 cm−3). We explain these results in terms of an exchange-based spin diffusion regime in which the exchange interactions decouple spin and charge transport.

Type: Article
Title: Long spin diffusion lengths in doped conjugated polymers due to enhanced exchange coupling
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s41928-019-0222-5
Publisher version: https://doi.org/10.1038/s41928-019-0222-5
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Electronic and spintronic devices, Electronic devices, Molecular electronics, Polymers
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10086922
Downloads since deposit
487Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item