| Autor: |
Bieri, E., Weiss, M., Goktas, O., Hauser, M., Csonka, S., Oberholzer, S., Schonenberger, C. |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 79, 245324 (2009) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.79.245324 |
| Popis: |
We use an electronic Mach-Zehnder interferometer to explore the non-equilibrium coherence of the electron waves within the edge-states that form in the integral quantum Hall effect. The visibility of the interference as a function of bias-voltage and transmission probabilities of the mirrors, which are realized by quantum point-contacts, reveal an unexpected asymmetry at finite bias when the transmission probability $T$ of the mirror at the input of the interferometer is varied between 0 and 100%, while the transmission probability of the other mirror at the output is kept fixed. This can lead to the surprising result of an increasing magnitude of interference with increasing bias-voltage for certain values of $T$. A detailed analysis for various transmission probabilities and different directions of the magnetic field demonstrates that this effect is not related to the transmission characteristics of a single quantum point contact, but is an inherent property of the Mach-Zehnder interferometer with edge-states. |
| Databáze: |
arXiv |
| Externí odkaz: |
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