Yang Yi, Fu Yu, Zhu Wenliang, He Junbao, Liu Bo, Liu Congbin, Li Liang, Niu Chunyao, Luo Yongsong
School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang, 473061, People's Republic of China.
J Phys Condens Matter. 2022 Jun 6;34(31). doi: 10.1088/1361-648X/ac718d.
We have grown the high quality single crystals of SrCdBisuccessfully and investigated the physical properties systematically through measurements of magnetoresistance (MR), Hall effect, magnetic susceptibility, and specific heat measurements. The compound is a nonmagnetic 112-type pnictide with a Bi square net layer, which is potential for hosting Dirac fermions. We found that it exhibited metallic behavior with an anomaly appearing at around 210 K. MR study reveal that the electronic structure of SrCdBiis quasi-two-dimensional. At low temperatures, we observed magnetic field induced metal-to-insulator-like transition and resistivity plateau, nonsaturating quasilinear MR, and high carrier mobility in magnetotransport measurements, which indicate the possible existence of nearly massless Dirac fermions in SrCdBi. The anomaly at around 210 K can be observed in resistivity, Hall effect, and magnetic susceptibility, but cannot be detected in heat capacity. This implies the anomaly might be caused by domain formation or disorder. We found that the nonsaturating linear MR in SrCdBiis likely caused by both of the quantum linear dispersion and the classical disorder. Our findings suggest that SrCdBiis a natural experimental platform for realizing the topological properties of nonmagnetic 112-type pnictides.
