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Reversible spin storage in metal oxide-fullerene heterojunctions.

Authors :
Moorsom T
Rogers M
Scivetti I
Bandaru S
Teobaldi G
Valvidares M
Flokstra M
Lee S
Stewart R
Prokscha T
Gargiani P
Alosaimi N
Stefanou G
Ali M
Al Ma'Mari F
Burnell G
Hickey BJ
Cespedes O
Source :
Science advances [Sci Adv] 2020 Mar 20; Vol. 6 (12), pp. eaax1085. Date of Electronic Publication: 2020 Mar 20 (Print Publication: 2020).
Publication Year :
2020

Abstract

We show that hybrid MnO <subscript>x</subscript> /C <subscript>60</subscript> heterojunctions can be used to design a storage device for spin-polarized charge: a spin capacitor. Hybridization at the carbon-metal oxide interface leads to spin-polarized charge trapping after an applied voltage or photocurrent. Strong electronic structure changes, including a 1-eV energy shift and spin polarization in the C <subscript>60</subscript> lowest unoccupied molecular orbital, are then revealed by x-ray absorption spectroscopy, in agreement with density functional theory simulations. Muon spin spectroscopy measurements give further independent evidence of local spin ordering and magnetic moments optically/electronically stored at the heterojunctions. These spin-polarized states dissipate when shorting the electrodes. The spin storage decay time is controlled by magnetic ordering at the interface, leading to coherence times of seconds to hours even at room temperature.<br /> (Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).)

Details

Language :
English
ISSN :
2375-2548
Volume :
6
Issue :
12
Database :
MEDLINE
Journal :
Science advances
Publication Type :
Academic Journal
Accession number :
32219155
Full Text :
https://doi.org/10.1126/sciadv.aax1085