Superconducting Order from Local Disorder

Aifeng Wang, E. Stavitski, M. Naamneh, V. N. Ivanovski, M. Abeykoon, A. Milosavljevic, W. H. Brito, A. Baum, J. Jandke, Qianheng Du, N. Lazarevic, Yu Liu, N. C. Plumb, G. Kotliar, R. Hackl, Z. V. Popovic, M. Radovic, K. Attenkofer, C. Petrovic

Research output: Working paper/PreprintPreprint

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Abstract

In all Fe superconductors the maximal Tc correlates with the average anion height above the Fe plane, i.e. with the geometry of the FeAs4 or FeCh4 (Ch=Te,Se,S) tetrahedron. By synthesizing FeSe1−xSx (0≤ x ≤ 1) single crystals we find that Tc does scale with the average anion height for x in the presence of nematic order and near FeS, whereas superconductivity changes for all other x track local crystallographic disorder and disorder-related scattering. Our findings demonstrate the strong coupling between disorder and Tc as x is tuned beyond the nematic critical point (NCP) and provide evidence of a Tc tuning related to local crystal
parameters.
Original languageEnglish
StatePublished - 14 Sep 2020

Keywords

  • cond-mat.supr-con
  • cond-mat.str-el

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