Details

Autor(en) / Beteiligte

• Kataoka, M
• Johnson, N
• Emary, C
• See, P
• Griffiths, J P
• Jones, G A C
• Farrer, I
• Ritchie, D A
• Pepper, M
• Janssen, T J B M

Titel

Time-of-Flight Measurements of Single-Electron Wave Packets in Quantum Hall Edge States

Ist Teil von

• Physical review letters, 2016-03, Vol.116 (12), p.126803-126803, Article 126803

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report time-of-flight measurements on electrons traveling in quantum Hall edge states. Hot-electron wave packets are emitted one per cycle into edge states formed along a depleted sample boundary. The electron arrival time is detected by driving a detector barrier with a square wave that acts as a shutter. By adding an extra path using a deflection barrier, we measure a delay in the arrival time, from which the edge-state velocity v is deduced. We find that v follows 1/B dependence, in good agreement with the E[over →]×B[over →] drift. The edge potential is estimated from the energy dependence of v using a harmonic approximation.