Time-of-Flight measurements of Single-Electron wave packets in quantum hall edge states
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.
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×→B drift. The edge potential is estimated from the energy dependence of v using a harmonic approximation.
Kataoka, M., Johnson, N., Emary, C., See, P., Griffiths, J., Jones, G., …Janssen, T. (2016). Time-of-Flight measurements of Single-Electron wave packets in quantum hall edge states. Physical review letters, 116(12), Article 126803. https://doi.org/10.1103/PhysRevLett.116.126803
|Journal Article Type||Article|
|Acceptance Date||Feb 22, 2016|
|Online Publication Date||Mar 22, 2016|
|Publication Date||Mar 22, 2016|
|Deposit Date||Jun 28, 2018|
|Journal||Physical Review Letters|
|Publisher||American Physical Society|
|Peer Reviewed||Peer Reviewed|
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