“Metallization” of semimetals by an external electric field

Abstract

The paper considers the possibility of changing the energy spectrum of the electronic subsystem of semimetals from a non-degenerate to a degenerate state under the action of an external electric field. This “metallization” of semimetals is achieved by increasing the concentration of free electrons in the external field. The work also considers the possible transition of “metallized” semimetals to the superconducting state. The evaluations made show that for the size of the sample R ≤ 100 nm and for the magnitude of the field source voltage U ≈ 10 V, “metallized” semimetals and their solid solutions can undergo transition to a superconducting state at temperatures Tc ≥ 100 K, which is an order of magnitude higher than the characteristic temperature value Tc for classic metals.