6533b86dfe1ef96bd12c95b8
RESEARCH PRODUCT
Extreme sensitivity of superconductivity to stoichiometry in Fe1+?Se
Yew San HorNai Phuan OngDongxia QuHenny W. ZandbergenClaudia FelserVadim KsenofontovTyrel M. McqueenJared M. AllredJoseph CheckelskyQingzhen HuangA. J. WilliamsRobert J. CavaQiang Xusubject
SuperconductivityMaterials scienceCondensed matter physics02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesInstabilityElectronic Optical and Magnetic MaterialsArsenidechemistry.chemical_compoundchemistryCondensed Matter::Superconductivity0103 physical sciences010306 general physics0210 nano-technologyStoichiometrydescription
The recently discovered iron arsenide superconductors appear to display a universal set of characteristic features, including proximity to a magnetically ordered state and robustness of the superconductivity in the presence of disorder. Here we show that superconductivity in Fe1+?Se, which can be considered the parent compound of the superconducting arsenide family, is destroyed by very small changes in stoichiometry. Further, we show that nonsuperconducting Fe1+?Se is not magnetically ordered down to 5 K. These results suggest that robust superconductivity and immediate instability against an ordered magnetic state should not be considered as intrinsic characteristics of iron-based superconducting systems.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-29 | Physical Review B, 79 (1), 2009 |