Journal
PHYSICAL REVIEW B
Volume 92, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.235447
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Funding
- University of Minnesota startup fund
- Spanish Ministry of Economy [FI52011-23713]
- European Research Council [290846]
- European Commission under the Graphene Flagship [CNECTICT-604391]
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We examine the nature of topological currents in black phosphorus when its inversion symmetry is deliberately broken. Here, the conduction- and valence-band edges are located at the Gamma point of the rectangular Brillouin zone, and they exhibit strong anisotropy along its two crystal axes. We will show below that these salient features lead to linear transverse neutral topological currents, accompanied also by nonlinear transverse charge currents at the Fermi surface. These topological currents are maximal when the in-plane electric field is applied along the zigzag crystal axes but zero along the armchair direction.
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