Pressure-induced superconductivity in EuFe2As2 without a quantum critical point: Magnetotransport and upper critical field measurements under high pressure
Nobuyuki Kurita, Motoi Kimata, Kota Kodama, Atsushi Harada, Megumi Tomita, Hiroyuki S. Suzuki, Takehiko Matsumoto, Keizo Murata, Shinya Uji, Taichi Terashima
DOI 10.1103/PhysRevB.88.224510 · Physical Review B
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Abstract
Resistivity and Hall effect measurements of EuFe2As2 up to 3.2 GPa indicate no divergence of quasiparticle effective mass at the pressure Pc where the magnetic and structural transition disappears. This is corroborated by analysis of the temperature (T) dependence of the upper critical field. T-linear resistivity is observed at pressures slightly above Pc. The scattering rates for both electrons and holes are shown to be approximately T-linear. When a field is applied, a T2 dependence is recovered, indicating that the origin of the T-linear dependence is spin fluctuations.
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 |
| EuFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | 2.5 GPa | unknown |
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