Insulating and metallic spin glass in KxFe2-δ-yNiySe2 (0.06 ≤ y ≤ 1.44 ) single crystals
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Belgrade, Belgrade (Serbia)
We report electron doping effects by Ni in KxFe2-δ-yNiySe₂ (0.06 ≤ y ≤ 1.44) single crystal alloys. A rich ground state phase diagram is observed. Thus, a small amount of Ni (~ 4%) suppressed superconductivity below 1.8 K, inducing insulating spin glass magnetic ground state for higher Ni content. With further Ni substitution, metallic resistivity is restored. For high Ni concentration in the lattice the unit cell symmetry is high symmetry I4/mmm with no phase separation whereas both I4/m + I4/mmm space groups were detected in the phase separated crystals when concentration of Ni < Fe. The absence of superconductivity coincides with the absence of crystalline Fe vacancy order.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; AC02-98CH10886
- OSTI ID:
- 1193231
- Alternate ID(s):
- OSTI ID: 1179694
- Report Number(s):
- BNL-108122-2015-JA; PRBMDO; R&D Project: PM016; KC0201050
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 18; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 6 works
Citation information provided by
Web of Science
Web of Science
Glass-induced enhancement of superconducting $T_c$: Pairing via dissipative mediators | text | January 2019 |
Lattice dynamics and phase transition in single crystals
|
journal | September 2018 |
Glass-induced enhancement of superconducting : Pairing via dissipative mediators
|
journal | April 2019 |
Similar Records
On the Nanoscale Structure of KxFe2-yCh2 (Ch = S, Se): A Neutron Pair Distribution Function View
Fe Vacancy Order and Domain Distribution in A{sub x}Fe{sub 2−y}Se{sub 2}
Appearance of superconductivity at the vacancy order-disorder boundary in
Journal Article
·
Tue Jul 03 00:00:00 EDT 2018
· Condensed Matter
·
OSTI ID:1193231
+4 more
Fe Vacancy Order and Domain Distribution in A{sub x}Fe{sub 2−y}Se{sub 2}
Journal Article
·
Thu Mar 15 00:00:00 EDT 2018
· Journal of Superconductivity and Novel Magnetism
·
OSTI ID:1193231
Appearance of superconductivity at the vacancy order-disorder boundary in
Journal Article
·
Mon May 14 00:00:00 EDT 2018
· Physical Review B
·
OSTI ID:1193231
+2 more