Unique phase diagram with narrow superconducting dome in EuFe2(As1−xPx)2 due to Eu2+ local magnetic moments
Y. Tokiwa, S.-H. Hübner, O. Beck, H. S. Jeevan, P. Gegenwart
DOI 10.1103/PhysRevB.86.220505 · Physical Review B
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Abstract
The interplay between superconductivity and Eu2+ magnetic moments in EuFe2(As1−xPx)2 is studied with electrical resistivity measurements under hydrostatic pressure on x=0.13 and x=0.18 single crystals. We can map hydrostatic pressure to chemical pressure x and show that superconductivity is confined to a very narrow range 0.18≤x≤0.23 in the phase diagram, beyond which ferromagnetic (FM) Eu ordering suppresses superconductivity. The change from antiferro- to FM Eu ordering at the latter concentration coincides with a Lifshitz transition and the complete depression of iron magnetic order.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAs(O,F) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| EuFe2(As1-xPx)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| EuFe2(As0.7P0.3)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| EuFe2(As0.82P0.18)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure unresolved | onset |
| EuFe2(As0.82P0.18)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure unresolved | onset |
| EuFe2(As0.82P0.18)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure unresolved | onset |
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