¹¹⁵In-NQR evidence for unconventional superconductivity in CeIn₃ under pressure

الأصل · EN

We report evidence for unconventional superconductivity in CeIn₃ at a pressure P = 2.65 GPa above critical pressure (Pc 2.5 GPa) revealed by the measurements of nuclear-spin-lattice-relaxation time (T₁) and ac-susceptibility (ac-chi). Both the measurements of T₁ and ac-chi have pointed to a superconducting transition at Tc = 95 mK, which is much lower than an onset temperature Tonset = 0.15 K at zero resistance. The temperature dependence of 1/T₁ shows no coherence peak just below Tc, indicative of an unconventional nature for the superconductivity induced in CeIn₃.