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Manipulating surface magnetic order in iron telluride

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Date
01/03/2019
Author
Trainer, Christopher William James
Yim, Chi Ming
Heil, Christoph
Giustino, Feliciano
Croitori, Dorina
Tsurkan, Vladimir
Loidl, Alois
Rodriguez, Efrain
Stock, Chris
Wahl, Peter
Funder
EPSRC
EPSRC
Grant ID
EP/I031014/1
EP/R031924/1
Keywords
QC Physics
T Technology
DAS
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Abstract
Control and manipulation of emergent magnetic orders in strongly correlated electron materials promises new opportunities for device concepts which exploit these for spintronics applications. For their technological exploitation it is important to understand the role of surfaces and interfaces to other materials, and their impact on the emergent magnetic orders. Here, we demonstrate for iron telluride, the non-superconducting parent compound of the iron chalcogenide superconductors, determination and manipulation of the surface magnetic structure by low temperature spin-polarized scanning tunneling microscopy. Iron telluride exhibits a complex structural and magnetic phase diagram as a function of interstitial iron concentration. Several theories have been put forward to explain the different magnetic orders observed in the phase diagram, which ascribe a dominant role either to interactions mediated by itinerant electrons or to local moment interactions. Through the controlled removal of surface excess iron, we can separate the influence of the excess iron from that of the change in the lattice structure.
Citation
Trainer , C W J , Yim , C M , Heil , C , Giustino , F , Croitori , D , Tsurkan , V , Loidl , A , Rodriguez , E , Stock , C & Wahl , P 2019 , ' Manipulating surface magnetic order in iron telluride ' , Science Advances , vol. 5 , no. 3 , eaav3478 . https://doi.org/10.1126/sciadv.aav3478
Publication
Science Advances
Status
Peer reviewed
DOI
https://doi.org/10.1126/sciadv.aav3478
ISSN
2375-2548
Type
Journal article
Rights
Copyright © 2019 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).
Description
C.T., C.M.Y. and P.W. acknowledge funding from EPSRC through EP/L505079/1, EP/I031014/1 and EP/R031924/1, and C.S. through EP/M01052X/1. V.T., A.L. and J.D. acknowledge funding from the Deutsche Forschungsgemeinschaft (DFG) via the Transregional Collaborative Research Center TRR 80 (Augsburg, Munich, Stuttgart). C.H. acknowledges support from the Austrian Science Fund (FWF) project No. J3806-N36 and the Vienna Science Cluster. F.G. acknowledges support from the Leverhulme Trust (Grant RL-2012-001) and the UK EPSRC Research Council (EP/M020517/1).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/17212

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