Phase Diagram of KxFe2-ySe2-zSz and the Suppression of its Superconducting State by an Fe2-Se/S Tetrahedron Distortion
Journal Article
·
· Physical Review Letters
We report structurally tuned superconductivity in a K{sub x}Fe{sub 2-y}Se{sub 2-z}S{sub z} (0 {le} z {le} 2) phase diagram. Superconducting T{sub c} is suppressed as S is incorporated into the lattice, eventually vanishing at 80% of S. The magnetic and conductivity properties can be related to stoichiometry on a poorly occupied Fe1 site and the local environment of a nearly fully occupied Fe2 site. The decreasing T{sub c} coincides with the increasing Fe1 occupancy and the overall increase in Fe stoichiometry from z = 0 to z = 2. Our results indicate that the irregularity of the Fe2-Se/S tetrahedron is an important controlling parameter that can be used to tune the ground state in the new superconductor family.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1041687
- Report Number(s):
- BNL--97365-2012-JA
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 107; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phase Diagram of KxFe2-ySe2-zSz and the Suppression of its Superconducting State by an Fe2-Se=S Tetrahedron Distortion
Phase Diagram of and the Suppression of its Superconducting State by an Tetrahedron Distortion
NMR Characterization of Sulphur Substitution Effects in the KxFe2−ySe2−zSz High-Tc Superconductor
Journal Article
·
Mon Sep 19 00:00:00 EDT 2011
· Physical Review Letters
·
OSTI ID:1045885
Phase Diagram of and the Suppression of its Superconducting State by an Tetrahedron Distortion
Journal Article
·
Thu Sep 01 00:00:00 EDT 2011
· Physical Review Letters
·
OSTI ID:1385599
NMR Characterization of Sulphur Substitution Effects in the KxFe2−ySe2−zSz High-Tc Superconductor
Journal Article
·
Tue Apr 17 00:00:00 EDT 2012
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:1049250