Two-dimensional hopping conductivity in a -doped heterostructure
- 15 February 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 59 (7), 4580-4583
- https://doi.org/10.1103/physrevb.59.4580
Abstract
We present zero magnetic-field resistivity measurements of the variable-range hopping (VRH) in a two-dimensional electron gas created at a δ-doped heterostructure. When either the temperature or carrier density are reduced the longitudinal resistivity shows a crossover from two-dimensional Mott VRH, to Efros-Shklovskii (ES) Coulomb-gap behavior In both regimes, near the crossover, the data collapse onto universal curves with a temperature independent prefactor or The latter result is in close agreement with measurements of Si metal-oxide-semiconductor field-effect transistors. We discuss the possible implications of our data on the theory of phonon-assisted VRH.
Keywords
This publication has 15 references indexed in Scilit:
- Screening of the Coulomb interaction in two-dimensional variable-range hoppingPhysical Review B, 1997
- Experimental evidence for a Coulomb gap in two dimensionsPhysical Review B, 1995
- Electronic Properties of Doped SemiconductorsPublished by Springer Science and Business Media LLC ,1984
- Low-temperature investigations of the quantum Hall effect in heterojunctionsPhysical Review B, 1983
- Hopping conduction in the Landau level tails in GaAs-AlxGa1-xAs heterostructures at low temperaturesSolid State Communications, 1983
- The Anderson transitionProceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, 1975
- Coulomb gap and low temperature conductivity of disordered systemsJournal of Physics C: Solid State Physics, 1975
- Correlation effects in hopping conduction: Hopping as a multi-electron transitionJournal of Non-Crystalline Solids, 1972
- Effect of carrier-carrier interactions on some transport properties in disordered semiconductorsDiscussions of the Faraday Society, 1970
- Conduction in glasses containing transition metal ionsJournal of Non-Crystalline Solids, 1968