Transport in T-shaped ballistic junction

Details Transport in T-shaped ballistic junction Transport in T-shaped ballistic junction

2011-12-29

arxiv.org/abs/1112.6264v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 14 figures

Scientific paper

We present studies of ballistic transport in three terminal T-shaped junction in a linear and non-linear regime. The floating electrode acts as a scatterer and modifies the conductance in a direct channel (between source and drain electrode). In the low voltage limit, the conductance shows the Wigner threshold effect and the bend resistance. A specific shape of the Wigner singularities can be changed by applied voltage to the floating electrode as well as by a shift of the Fermi level. The system also exhibits filtering properties with current distribution between different modes propagating in the junction. Back action of current flowing in the direct channel on changes of the voltage in the floating electrode is considered in the non-linear regime.

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