Atomic-scale coexistence of short-range magnetic order and superconductivity in Fe1+ySe0.1Te0.9
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ALURU , Ramakrishna, ZHOU, Haibiao, ESSIG, Antoine, REID, J.-Ph., TSURKAN, Vladimir, LOIDL, Alois, DEISENHOFER, Joachim, WAHL, Peter. Atomic-scale coexistence of short-range magnetic order and superconductivity in Fe1+ySe0.1Te0.9. In: Physical Review Materials, 2019, nr. 3(8), p. 0. ISSN -. DOI: https://doi.org/10.1103/PhysRevMaterials.3.084805
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Physical Review Materials
Numărul 3(8) / 2019 / ISSN - /ISSNe 2475-9953

Atomic-scale coexistence of short-range magnetic order and superconductivity in Fe1+ySe0.1Te0.9

DOI:https://doi.org/10.1103/PhysRevMaterials.3.084805

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Aluru Ramakrishna1, Zhou Haibiao2, Essig Antoine3, Reid J.-Ph.4, Tsurkan Vladimir5, Loidl Alois6, Deisenhofer Joachim6, Wahl Peter1
 
1 University of St Andrews,
2 University of Science and Technology of China,
3 Ecole Normale Superieure de Lyon,
4 University of Sherbrooke,
5 Institute of Applied Physics,
6 University of Augsburg
 
 
Disponibil în IBN: 1 octombrie 2019


Rezumat

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.