| Autor: |
Daming Zhou, Beckel, Andreas, Ludwig, Arne, Wieck, Andreas D., Geller, Martin, Lorke, Axel |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 6/15/2015, Vol. 106 Issue 24, p1-4, 4p, 3 Graphs |
| Abstrakt: |
We demonstrate the possibility to tune the tunneling probability between an array of selfassembled quantum dots and a two-dimensional electron gas (2DEG) by changing the energy imbalance between the dot states and the 2DEG. Contrary to the expectation from Fowler- Nordheim tunneling, the tunneling rate decreases with increasing injection energy. This can be explained by an increasing momentum mismatch between the dot states and the Fermi-circle in the 2DEG. Our findings demonstrate momentum matching as a useful mechanism (in addition to energy conservation, density of states, and transmission probability) to electrically control the charge transfer between quantum dots and an electron reservoir. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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