Non-ohmic hopping conductivity in the exponential band tail
Gurvich Yn.A., Melnikov A.P., Shestakov L.N., Gersheiizon E.M.
The variable range hopping conductivity in strong electric field Ε at temperature Τ 0 is investigated. An exponential increase of density of states g(e) with energy e is assumed. It is shown that there is an energy level e-ej(£) ("the transport level"), along which an electron hops without rising or lowering in average. The dependence <r(e) has the form: -ln<r~ l/E.
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![](/ps/353/article_5563_800_head.png "<b>The variable range hopping conductivity in strong electric field <i>Ε </i>at temperature <i>Τ </i>0 is investigated. An exponential increase of density of states g(e) with energy e is assumed. It is shown that there is an energy level e-ej(£) ("the transport level"), along which an electron hops without rising or lowering in average. The dependence <r(e) has the form: -ln<r~ <i>l/E.</i></b>")