000890115 001__ 890115
000890115 005__ 20240529111654.0
000890115 037__ $$aFZJ-2021-00704
000890115 041__ $$aEnglish
000890115 1001_ $$0P:(DE-Juel1)177779$$aNandi, Shibabrata$$b0$$eCorresponding author
000890115 1112_ $$aSeminar RWTH Aachen "Umhabilitation"$$cZOOM online meeting$$d2021-01-27 - 2021-01-27$$wZOOM online meeting
000890115 245__ $$aStructure, magnetism, and superconductivity in Fe-based superconductors$$f2021-01-27 - 
000890115 260__ $$c2021
000890115 3367_ $$033$$2EndNote$$aConference Paper
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000890115 520__ $$aIn iron-based high-temperature superconductors, magnetic fluctuations and magneto-elastic effects are believed to be important for the superconducting electron pairing mechanism. To gain insight into the interplay between the different ordering phenomena and the underlying couplings we studied the magnetic order and lattice distortion on AFe2As2  (A = Ca, Sr, Ba, Eu) single crystals by neutron and x-ray diffraction. High-resolution x-ray diffraction and neutron scattering measurements reveal an unusually strong response of the lattice and ordered magnetic moment to superconductivity in Co-doped BaFe2As2. We propose that the coupling between lattice and superconductivity is indirect and arises due to the magnetoelastic coupling, in the form of emergent nematic order, and the strong competition between the magnetism and superconductivity. In contrast to the coexistence of superconductivity and antiferromagnetism in the Co-doped “122” sample, we show that the superconductivity and ferromagnetism coexist in the P-doped Eu based “122” Fe-pnictides. Coexistence between these two antagonistic phenomena are puzzling but can be explained in terms of the formation of a spontaneous vortex state.
000890115 536__ $$0G:(DE-HGF)POF3-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)$$cPOF3-623$$fPOF III$$x0
000890115 536__ $$0G:(DE-HGF)POF4-632$$a632 - Materials – Quantum, Complex and Functional Materials (POF4-632)$$cPOF4-632$$fPOF IV$$x1
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000890115 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)177779$$aForschungszentrum Jülich$$b0$$kFZJ
000890115 9130_ $$0G:(DE-HGF)POF3-623$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6G4$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vFacility topic: Neutrons for Research on Condensed Matter$$x0
000890115 9131_ $$0G:(DE-HGF)POF4-632$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lFrom Matter to Materials and Life$$vMaterials – Quantum, Complex and Functional Materials$$x0
000890115 9141_ $$y2021
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000890115 980__ $$aI:(DE-82)080009_20140620
000890115 980__ $$aUNRESTRICTED
000890115 981__ $$aI:(DE-Juel1)JCNS-2-20110106