Pressure-induced superconductivity in the orthorhombic Kondo compound CePtSi2
Tomohito Nakano, Masashi Ohashi, Gendo Oomi, Kazuyuki Matsubayashi, Yoshiya Uwatoko
DOI 10.1103/PhysRevB.79.172507 · Physical Review B
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Abstract
We have discovered a member of superconductivity induced by hydrostatic pressure in an antiferromagnetic (AF) concentrated Kondo compound CePtSi2 by measuring the resistivity and magnetoresistance. The AF transition temperature TN of 1.8 K at ambient pressure is suppressed by pressure and disappears around 1.2 GPa. Above 1.4 GPa, a superconducting phase appears between 1.4 and 2.4 GPa, with the maximum Tc of 0.14 K at 1.7 GPa. The upper critical field of the superconductivity is evaluated to be 0.7 T, which is clearly larger than that of the Pauli limit predicted by the BCS theory.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CePtSi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.14 | 1.7 GPa | onset |
| CePtSi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.12 | 1.8 GPa | onset |
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