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Exotic Superconductivity in the Coexistent Phase of Antiferromagnetism and Superconductivity in CeCu<sub>2</sub>(Si<sub>0.98</sub>Ge<sub>0.02</sub>)<sub>2</sub>: A Cu-NQR Study under Hydrostatic Pressure

Exotic Superconductivity in the Coexistent Phase of Antiferromagnetism and Superconductivity in CeCu<sub>2</sub>(Si<sub>0.98</sub>Ge<sub>0.02</sub>)<sub>2</sub>: A Cu-NQR Study under Hydrostatic Pressure

We report a pressure ( P ) effect on CeCu 2 (Si 0.98 Ge 0.02 ) 2 where an antiferromagnetic (AFM) order at T N ∼0.75 K coexists with superconductivity below T c ∼0.4 K. At pressures exceeding P = 0.19 GPa, the AFM order is suppressed, which demonstrates that …