De Haas–van Alphen Effect in Quasi-Two-Dimensional Material La2RhIn8

Abstract

We have grown a single crystal of La 2 RhIn 8 with the tetragonal structure and have measured the de Haas–van Alphen (dHvA) effect and magnetoresistance in the 4 He temperature region up to 9 T. The two dHvA frequencies α=6220 T and β=400 T were observed for the field along the [001] direction. The corresponding cross-sectional areas of the Fermi surfaces of α and β are about 33 and 2% of the Brillouin zone base area, respectively. The cyclotron mass m c * for the α is about 0.7 m 0 , where m 0 is the free electron mass. The angular dependence of the dHvA frequencies suggests that the frequency α originates from a large cylindrical Fermi surface elongated the c -axis, and the frequency β corresponds to a small pocket. The result of the magnetoresistance suggests that La 2 RhIn 8 is an uncompensated metal.