Superconductivity in the PbO-type Structure alpha-FeSe

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dc.creatorHsu, Fong-Chi
dc.creatorLuo, Jiu-Yong
dc.creatorYeh, Kuo-Wei
dc.creatorChen, Ta-Kun
dc.creatorHuang, Tzu-Wen
dc.creatorWu, Phillip M.
dc.creatorLee, Yong-Chi
dc.creatorHuang, Yi-Lin
dc.creatorChu, Yan-Yi
dc.creatorYan, Der-Chung
dc.creatorWu, Maw-Kuen
dc.date2008-07-15
dc.date2008-07-16
dc.date.accessioned2026-07-07T09:50:28Z
dc.date.available2026-07-07T09:50:28Z
dc.descriptionThe recent discovery of superconductivity with relatively high transition temperature Tc in the layered iron-based quaternary oxypnictides La[ O1-xFx] FeAs was a real surprise. The excitement generated can be seen by the number of subsequent works published within a very short period of time. Although there exists superconductivity in alloy that contains Fe element, LaOMPn (with M= Fe, Ni; and Pn=P and As) is the first system where Fe-element plays the key role to the occurrence of superconductivity. LaOMPn has a layered crystal structure with an Fe-based plane. It is quite natural to ask whether there exists other Fe based planar compounds that exhibit superconductivity. Here we report the observation of superconductivity with zero resistance transition temperature at 8K in the PbO-type alpha-FeSe compound. Although FeSe has been studied quite extensively, a key observation is that the clean superconducting phase exists only in those samples prepared with intentional Se deficiency. What is truly striking, is that this compound has the same, perhaps simpler, planar crystal sublattice as the layered oxypnictides. Furthermore, FeSe is, compared with LaOFeAs, much easier to handle and fabricate. In view of the abundance of compounds with PbO type structure, this result opens a new route to the search for unconventional superconductors.
dc.descriptionPDF format, 10 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0807.2369
dc.identifierhttp://arxiv.org/abs/0807.2369
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/164955
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleSuperconductivity in the PbO-type Structure alpha-FeSe
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