Atomic-scale coexistence of short-range magnetic order and superconductivity in Fe1+ySe0.1Te0.9
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The ground state of the parent compounds of many high-temperature superconductors is an antiferromagnetically ordered phase, where superconductivity emerges when the antiferromagnetic phase transition is suppressed by doping or application of pressure. This behavior implies a close relation between the two orders. Examining the interplay between them promises a better understanding of how the superconducting condensate forms from the antiferromagnetically ordered background. Here we explore this relation in real space at the atomic scale using low-temperature spin-polarized scanning tunneling microscopy and spectroscopy. We investigate the transition from antiferromagnetically ordered Fe1+yTe via the spin-glass phase in Fe1+ySe0.1Te0.9 to superconducting Fe1+ySe0.15Te0.85. In Fe1+ySe0.1Te0.9 we observe an atomic-scale coexistence of superconductivity and short-ranged bicollinear antiferromagnetic order. However, a direct correlation between the two orders is not observed, supporting the scenario of s± superconducting symmetry in this material. Our work demonstrates a direct probe of the relation between the two orders, which is indispensable for our understanding of high-temperature superconductivity.
Aluru , R K P , Zhou , H , Essig , A , Reid , J-P , Tsurkan , V , Loidl , A , Deisenhofer , J & Wahl , G P 2019 , ' Atomic-scale coexistence of short-range magnetic order and superconductivity in Fe 1+y Se 0.1 Te 0.9 ' , Physical Review Materials , vol. 3 , no. 8 , 084805 . https://doi.org/10.1103/PhysRevMaterials.3.084805
Physical Review Materials
Copyright © 2019 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1103/PhysRevMaterials.3.084805
DescriptionFunding: UK EPSRC (EP/I031014/1) (HZ, J-PR, and PW)
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