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The parent Li(OH)FeSe phase of lithium iron hydroxide selenide superconductors

DOI: 10.1021/acs.inorgchem.6b01734 DOI Help

Authors: Daniel N. Woodruff (University of Oxford) , Francesca Schild (University of Oxford) , Craig V. Topping (University of Oxford) , Simon J. Cassidy (University of Oxford) , Jack N. Blandy (University of Oxford; Diamond Light Source) , Stephen J. Blundell (University of Oxford) , Amber L. Thompson (University of Oxford) , Simon J. Clarke (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Inorganic Chemistry

State: Published (Approved)
Published: September 2016
Diamond Proposal Number(s): 12763 , 13284 , 13639

Open Access Open Access

Abstract: Lithiation of hydrothermally synthesized Li1–xFex(OH)Fe1–ySe turns on high-temperature superconductivity when iron ions are displaced from the hydroxide layers by reductive lithiation to fill the vacancies in the iron selenide layers. Further lithiation results in reductive iron extrusion from the hydroxide layers, which turns off superconductivity again as the stoichiometric composition Li(OH)FeSe is approached. The results demonstrate the twin requirements of stoichiometric FeSe layers and reduction of Fe below the +2 oxidation state as found in several iron selenide superconductors.

Journal Keywords: Iron; Anions; Layers; Lithiation; Selenides

Subject Areas: Chemistry, Physics, Materials

Instruments: I11-High Resolution Powder Diffraction , I12-JEEP: Joint Engineering, Environmental and Processing , I19-Small Molecule Single Crystal Diffraction

Added On: 30/09/2016 15:25


Discipline Tags:

Superconductors Quantum Materials Physics Physical Chemistry Hard condensed matter - structures Chemistry Materials Science Inorganic Chemistry

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD) X-ray Powder Diffraction