Results are presented from investigations into the conductivity of heterostructures based on two-dimensionally ordered (TDO) linear-chain carbon (LCC) in the form of Al-LCC-Al and $p$Si-LCC-Al. The Al-LCC-Al structure is shown to possess a nonlinear ohmic contact with a barrier height of around 0.7 eV. It is shown that an over-barrier (Schottky) mechanism of electron injection to LCC in the forward direction and a tunneling effect (Fowler-Nordheim tunnel injection mechanism) in the backward direction occur in the $p$Si-LCC-Al heterostructure.
$^1$Faculty of Physics, Moscow State University, Moscow, 119991, Russia
$^2$Moscow State Technical University of Radio Engineering, Electronics, and Automation, pr. Vernadskogo 78, Moscow, 119454, Russia
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