Two-dimensional transport and strong spin–orbit interaction in SrMnSb2

• 来源期刊: 中国物理B（英文版）
• 关键词: high field transport spin–orbit interaction anisotropic g factor bulk quantum Hall effect
• 年，卷（期）: 2018,（1）
• 页码范围: 203-208
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/1/017504

摘要

We have carried out magneto-transport measurements for single crystal SrMnSb2. Clear Shubnikov–de Haas oscil-lations were resolved at relatively low magnetic field around 4 T, revealing a quasi-2D Fermi surface. We observed a development of quantized plateaus in Hall resistance (Rxy) at high pulsed fields up to 60 T. Due to the strong 2D confine-ment and layered properties of the samples, we interpreted the observation as bulk quantum Hall effect that is contributed by the parallel 2D conduction channels. Moreover, the spin degeneracy was lifted leading to Landau level splitting. The presence of anisotropic g factor and the formation of the oscillation beating pattern reveal a strong spin–orbit interaction in the SrMnSb2 system.