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Conductance fluctuations and disorder induced nu=0 quantum Hall plateau in topological insulator nanowires

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Xypakis,  Emmanouil
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Bardarson,  Jens H.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Xypakis, E., & Bardarson, J. H. (2017). Conductance fluctuations and disorder induced nu=0 quantum Hall plateau in topological insulator nanowires. Physical Review B, 95(3): 035415. doi:10.1103/PhysRevB.95.035415.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-5E15-3
Abstract
Clean topological insulators exposed to a magnetic field develop Landau levels accompanied by a nonzero Hall conductivity for the infinite slab geometry. In this work we consider the case of disordered topological insulator nanowires and find, in contrast, that a zero Hall plateau emerges within a broad energy window close to the Dirac point. We numerically calculate the conductance and its distribution for a statistical ensemble of disordered nanowires, and use the conductance fluctuations to study the dependence of the insulating phase on system parameters, such as the nanowire length, disorder strength, and the magnetic field.