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Electron scattering of mass-inverted in graphene quantum dots

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arxiv 2202.12877 v1 pith:JCUJCFYZ submitted 2022-02-25 cond-mat.mes-hall quant-ph

Electron scattering of mass-inverted in graphene quantum dots

classification cond-mat.mes-hall quant-ph
keywords scatteringquantumdetermineelectronsenergyfoundgraphenemass-inverted
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the scattering of Dirac electrons of circular graphene quantum dot with mass-inverted subject to electrostatic potential. The obtained solutions of the energy spectrum are used to determine the scattering coefficients at the interface of the two regions. Using the asymptotic solutions at large arguments, we explicitly determine the radial component of reflected current density and the scattering efficiency. It is found that the presence of a mass term outside in addition to another one inside the quantum dot strongly affects the scattering of electrons. In particular, a non-null square modulus of the scattering coefficient is found at zero energy.

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