Response of Superconductivity and Crystal Structure of LiFeAs to Hydrostatic Pressure.
On the application of hydrostatic pressures of up to 1 .3 GPa, the superconducting transition temperatures (T) of samples of LiFeAs are lowered approximately monotonically at approximately -2 K GPa. Measurements of the X-ray powder diffraction pattern at hydrostatic pressures of up to 17 GPa applied...
| Publicado en: | Journal of the American Chemical Society Vol. 131; no. 8; pp. 2986 - 2988 |
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| Autores principales: | , , , , , , , , |
| Formato: | Artículo |
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American Chemical Society
3/4/2009
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=37043250&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 37043250 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 3/4/2009 vid: 131 iid: 8 pid: 997 pub: American Chemical Society artinfo: ui: 37043250 10.1021/ja808914a ppf: 2986 ppct: 2 formats: tig: atl: Response of Superconductivity and Crystal Structure of LiFeAs to Hydrostatic Pressure. aug: au: Mito, Masaki Pitcher, Michael J. Crichton, Wilson Garbarino, Gaston Baker, Peter J. Blundell, Stephen J. Adamson, Paul Parker, Dinah A. Clarke, Simon J. affil: Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR,United Kingdom Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan su: Superconductivity Hydrostatic pressure Crystals Lithium ions Properties of matter X-rays Diamonds sug: subj: Superconductivity Hydrostatic pressure Crystals Lithium ions Properties of matter X-rays Diamonds ab: On the application of hydrostatic pressures of up to 1 .3 GPa, the superconducting transition temperatures (T) of samples of LiFeAs are lowered approximately monotonically at approximately -2 K GPa. Measurements of the X-ray powder diffraction pattern at hydrostatic pressures of up to 17 GPa applied by a He gas pressure medium in a diamond anvil cell reveal a bulk modulus for LiFeAs of 57.3(6) GPa which is much smaller than that of other layered arsenide and oxyarsenide superconductors. LIFeAs also exhibits much more isotropic compression than other layered iron arsenide superconductors. The higher and more isotropic compressibility is presumably a consequence of the small size of the lithium ion. At ambient pressure the FeAs tetrahedra are the most compressed in the basal plane of those in any of the superconducting iron arsenides. On increasing the pressure the Fe-Fe distance contracts more rapidly than the Fe-As distance so that the FeAs tetrahedra become even more distorted from the ideal tetrahedral shape. The decrease in T with applied pressure is therefore consistent with the observations that in the iron arsenides and related materials investigated thus far, T is maximized for a particular electron count when the FeAs tetrahedra are close to regular. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2009 holdings: @attributes: islocal: N |
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