Imperial College London
Portrait Picture

Nicholas M Harrison

Faculty of Natural Sciences, Department of Chemistry

Chair of Computational Materials Science
 
 
 
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Contact

 

+44 (0)20 7594 5884nicholas.harrison Website

 
 
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Location

 

401LMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Serri:2014:10.1038/ncomms4079,
author = {Serri, M and Wu, W and Fleet, LR and Harrison, NM and Hirjibehedin, CF and Kay, CWM and Fisher, AJ and Aeppli, G and Heutz, S},
doi = {10.1038/ncomms4079},
journal = {Nature Communications},
pages = {1--9},
title = {High-temperature antiferromagnetism in molecular semiconductor thin films and nanostructures},
url = {http://dx.doi.org/10.1038/ncomms4079},
volume = {5},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The viability of dilute magnetic semiconductors in applications is linked to the strength of the magnetic couplings, and room temperature operation is still elusive in standard inorganic systems. Molecular semiconductors are emerging as an alternative due to their long spin-relaxation times and ease of processing, but, with the notable exception of vanadium-tetracyanoethylene, magnetic transition temperatures remain well below the boiling point of liquid nitrogen. Here we show that thin films and powders of the molecular semiconductor cobalt phthalocyanine exhibit strong antiferromagnetic coupling, with an exchange energy reaching 100 K. This interaction is up to two orders of magnitude larger than in related phthalocyanines and can be obtained on flexible plastic substrates, under conditions compatible with routine organic electronic device fabrication. Ab initio calculations show that coupling is achieved via superexchange between the singly occupied a1g () orbitals. By reaching the key milestone of magnetic coupling above 77 K, these results establish quantum spin chains as a potentially useable feature of molecular films.
AU  - Serri,M
AU  - Wu,W
AU  - Fleet,LR
AU  - Harrison,NM
AU  - Hirjibehedin,CF
AU  - Kay,CWM
AU  - Fisher,AJ
AU  - Aeppli,G
AU  - Heutz,S
DO  - 10.1038/ncomms4079
EP  - 9
PY  - 2014///
SN  - 2041-1723
SP  - 1
TI  - High-temperature antiferromagnetism in molecular semiconductor thin films and nanostructures
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/ncomms4079
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000331084200021&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.nature.com/articles/ncomms4079
VL  - 5
ER  -
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