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Title: Reorientation of the diagonal double-stripe spin structure at Fe1+yTe bulk and thin-film surfaces

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms13939· OSTI ID:1345976

Here, establishing the relation between ubiquitous antiferromagnetism in the parent compounds of unconventional superconductors and their superconducting phase is important for understanding the complex physics in these materials. Going from bulk systems to thin films additionally affects their phase diagram. For Fe1+yTe, the parent compound of Fe1+ySe1$-x$Tex superconductors, bulk-sensitive neutron diffraction revealed an in-plane oriented diagonal double-stripe antiferromagnetic spin structure. Here we show by spin-resolved scanning tunnelling microscopy that the spin direction at the surfaces of bulk Fe1+yTe and thin films grown on the topological insulator Bi2Te3 is canted out of the high-symmetry directions of the surface unit cell resulting in a perpendicular spin component, keeping the diagonal double-stripe order. As the magnetism of the Fe d-orbitals is intertwined with the superconducting pairing in Fe-based materials, our results imply that the superconducting properties at the surface of the related superconducting compounds might be different from the bulk.

Research Organization:
Tulane Univ., New Orleans, LA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0014208; WI 3097/2
OSTI ID:
1345976
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (6)

Evidence for interfacial superconductivity in a bi-collinear antiferromagnetically ordered FeTe monolayer on a topological insulator text January 2016
Domain imaging across the magneto-structural phase transitions in Fe1+yTe journal April 2018
Two types of magnetic shape-memory effects from twinned microstructure and magneto-structural coupling in Fe 1+ y Te journal August 2019
Manipulating surface magnetic order in iron telluride journal March 2019
Atomic-scale distortions and temperature-dependent large pseudogap in thin films of the parent iron-chalcogenide superconductor Fe 1+ y Te journal November 2017
Manipulating surface magnetic order in iron telluride text January 2018