Giant Interlayer Magnetoresistances and Strong Anisotropy in p-type Sb₂Te₃ Single Crystals

Abstract

Anisotropic interlayer magneto-transport properties have been studied over a broad range of temperatures and magnetic fields in p-type Sb₂Te₃ single crystals. Giant interlayer magnetoresistance (MR) of up to 400% was observed, which exhibits quadratic field dependences in low fields and becomes linear at high fields without any trend towards saturation. The interlayer MR displays strong anisotropy and is attributable to the anisotropy of the Fermi surface. The observed giant anisotropic interlayer MR could find applications in p-type Sb₂Te₃ based magneto-electronic devices.

Keywords:

• Giant magneto-resistance
• anisotropy
• Fermi surface

Acknowledgments

X. L. Wang thanks the Australian Research Council for supporting this project through a Discovery project.