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Electro-magnetic Aharonov-Bohm effect in a 2-D electron gas ring | | W.G. van der Wiel
; Yu.V. Nazarov
; S. De Franceschi
; T. Fujisawa
; J.M. Elzerman
; E.W.G.M. Huizeling
; S. Tarucha
; L.P. Kouwenhoven
; | | Date: |
23 Jul 2001 | | Journal: | Phys. Rev. B 67, 033307 (2003) | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Abstract: | We define a mesoscopic ring in a 2-dimensional electron gas (2DEG) interrupted by two tunnel barriers, enabling us to apply a well-defined potential difference between the two halves of the ring. The electron interference in the ring is modified using a perpendicular magnetic field and a bias voltage. We observe clear Aharonov-Bohm oscillations up to the quantum Hall regime as a function of both parameters. The electron travel time between the barriers is found to increase with the applied magnetic field. Introducing a scattering model, we develop a new method to measure the non-equilibrium electron dephasing time, which becomes very short at high voltages and magnetic fields. The relevance of electron-electron interactions is discussed. | | Source: | arXiv, cond-mat/0107482 | | Services: | Forum | Review | PDF | Favorites | |
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