We report muon spin rotation (μSR) and magnetization measurements under pressure on Fe1+δSe1-xSx with x ≈0.11.Above p≈0.6 GPa we find microscopic coexistence of superconductivity with an extended dome of long range magnetic order that spans a pressure range between previously reported separated magnetic phases. The magnetism initially competes on an atomic scale with the coexisting superconductivity leading to a local maximum and minimum of the superconducting Tc(p). The maximum of Tc corresponds to the onset of magnetism while the minimum coincides with the pressure of strongest competition. A shift of the maximum of Tc(p) for a series of single crystals with x up to 0.14 roughly extrapolates to a putative magnetic and superconducting state at ambient pressure for x ≥0.2.
@article{arxiv.1905.07164,
title = {Extended Magnetic Dome Induced by Low Pressures in Superconducting FeSe$_\mathrm{1\text{-}x}$S$_\mathrm{x}$},
author = {S. Holenstein and J. Stahl and Z. Shermadini and G. Simutis and V. Grinenko and D. A. Chareev and R. Khasanov and J. -C. Orain and A. Amato and H. -H. Klauss and E. Morenzoni and D. Johrendt and H. Luetkens},
journal= {arXiv preprint arXiv:1905.07164},
year = {2019}
}
Comments
10 pages, 6 figures, including supplemental material