Pressure-induced magnetism in the iron-based superconductors AFe2As2 (A=K, Cs, Rb)

Rustem Khasanov; Zurab Guguchia; Elvezio Morenzoni; Chris Baines; Aifeng Wang; Xianhui Chen; Zbigniew Bukowski; Fazel Tafti

doi:10.1103/PhysRevB.102.140502

Pressure-induced magnetism in the iron-based superconductors AFe2As2 (A=K, Cs, Rb)

Rustem Khasanov, Zurab Guguchia, Elvezio Morenzoni, Chris Baines, Aifeng Wang, Xianhui Chen, Zbigniew Bukowski, Fazel Tafti

DOI 10.1103/PhysRevB.102.140502 · Physical Review B

T1

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Abstract

The magnetic properties of iron-based superconductors AFe2As2 (A=K, Cs, and Rb), which are characterized by the V-shaped dependence of the critical temperature (Tc) on pressure (P), were studied by means of the muon spin rotation/relaxation technique. In all three systems studied the magnetism was found to appear for pressures slightly below the critical one (Pc), i.e., at pressure where Tc(P) changes the slope. Rather than competing, magnetism and superconductivity in AFe2As2 are coexisting at the P≳Pc pressure region. Our results support the scenario of a transition from one pairing state to another, with different symmetries on either side of Pc.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
KFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CsFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown