Anomalous magneto-transport properties of bilayer phosphorene

Jhao-Ying Wu; Wu-Pei Su; Godfrey Gumbs

doi:10.1038/s41598-020-64106-0

Anomalous magneto-transport properties of bilayer phosphorene

Sci Rep. 2020 May 6;10(1):7674. doi: 10.1038/s41598-020-64106-0.

Authors

Jhao-Ying Wu¹, Wu-Pei Su², Godfrey Gumbs³

Affiliations

¹ Center of General Studies, National Kaohsiung University of Science and Technology, Kaohsiung, 811, Taiwan. yarst5@gmail.com.
² Department of Physics, University of Houston, Houston, Texas, USA.
³ Department of Physics and Astronomy, Hunter College at the City University of New York, New York, 10065, USA.

Abstract

The magneto-transport properties of phosphorene are investigated by employing the generalized tight-binding model to calculate the energy bands. For bilayer phosphorene, a composite magnetic and electric field is shown to induce a feature-rich Landau level (LL) spectrum which includes two subgroups of low-lying LLs. The two subgroups possess distinct features in level spacings, quantum numbers, as well as field dependencies. These together lead to anomalous quantum Hall (QH) conductivities which include a well-shape, staircase and composite quantum structures with steps having varying heights and widths. The Fermi energy-magnetic field-Hall conductivity (E_F-B_z-σ_xy) and Fermi energy-electric field-Hall conductivity (E_F-E_z-σ_xy) phase diagrams clearly exhibit oscillatory behaviors and cross-over from integer to half-integer QH effect. The predicted results should be verifiable by magneto-transport measurements in a dual-gated system.