Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals

Rongwei Hu; Hechang Lei; Milinda Abeykoon; Emil S. Bozin; Simon J. L. Billinge; J. B. Warren; Theo Siegrist; C. Petrovic

doi:10.1103/PhysRevB.83.224502

Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals

Superconductivity 2011-07-08 v1 Materials Science

Authors: Rongwei Hu , Hechang Lei , Milinda Abeykoon , Emil S. Bozin , Simon J. L. Billinge , J. B. Warren , Theo Siegrist , C. Petrovic

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Abstract

Understanding iron based superconductors requires high quality impurity free single crystals. So far they have been elusive for beta-FeSe and extraction of intrinsic materials properties has been compromised by several magnetic impurity phases. Herein we report synchrotron - clean beta-FeSe superconducting single crystals grown via LiCl/CsCl flux method. Phase purity yields evidence for a defect induced weak ferromagnetism that coexists with superconductivity below Tc. In contrast to Fe1+yTe - based superconductors, our results reveal that the interstitial Fe(2) site is not occupied and that all contribution to density of states at the Fermi level must come from in-plane Fe(1).

Keywords

iron-based superconductor beta-fese single crystal weak ferromagnetism superconductivity crystal structure

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@article{arxiv.1107.1496,
  title  = {Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals},
  author = {Rongwei Hu and Hechang Lei and Milinda Abeykoon and Emil S. Bozin and Simon J. L. Billinge and J. B. Warren and Theo Siegrist and C. Petrovic},
  journal= {arXiv preprint arXiv:1107.1496},
  year   = {2011}
}

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8 pages, 11 figures

Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals

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