Abstract

We observed the de Haas–van Alphen (dHvA) oscillations in CeRh 2 Si 2 under pressures up to 1.54 GPa. Three dHvA branches at higher pressure than the critical pressure p c ≃1.06 GPa are well explained by the result of the 4 f -itinerant model. Their cyclotron masses are large, being 24 m 0 , 30 m 0 and 31 m 0 , which are about 4 times larger than the corresponding band masses.

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