Lateral tunneling, ballistic transport, and spectroscopy in a two-dimensional electron gas
- 10 April 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 62 (15) , 1776-1779
- https://doi.org/10.1103/physrevlett.62.1776
Abstract
We report a direct observation, via electron energy spectroscopy, of lateral tunneling and lateral ballistic-electron transport in a two-dimensional electron gas (2D EG). This was accomplished through the use of a novel transistor structure employing two potential barriers, induced by 50-nm wide metal gates deposited on a GaAs/AlGaAs selectively doped heterostructure. Hot electrons with very narrow energy distributions (≃5 meV wide) have been observed to ballistically traverse 2D EG regions ≃170 nm wide with a mean free path of about 480 nm.Keywords
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