CNRS/C2N : Quantum Interferences in the Quantum Hall Regime 
Centre de Nanosciences et de Nanotechnologies - Campus de Marcoussis
Français Anglais
Physics and Technology of Nanostructures (PHYNANO) > Quantum Transport > Quantum Interferences in the Quantum Hall Regime
image 2
image 3
image 6

PHYNANO > Quantum Transport >

Quantum Interferences in the Quantum Hall Regime


A two-dimensional gas of electrons in the presence of a strong magnetic field shows a very peculiar behavior : the current is carried by one-dimensional channels along the edges of the sample. This suggests that one can use these so-called edge states as an electron beam the same way a laser produces a photon beam. A split gate on the top of the semiconductor provides the equivalent of a beam splitter, with the advantage compared to the optical one, that the voltage fixes the transparency of the splitter. At very low temperature, the phase coherence of the electrons extends over several micrometers and nanofabrication techniques are then able to realize a solid state device which mimics the standard Mach-Zehnder optical interferometer.


Puce Contacts: Dominique Mailly and Giancarlo Faini

Puce And also... Ulf Gennser

Puce External collaborators: Fabien Portier and Patrice Roche (SPEC, CEA, Saclay).

Puce Publications:< (updated on october 2013)

  • 'Quantum coherence engineering in the integer quantum Hall regime', P-A. Huynh, F. Portier, H. le Sueur, G. Faini, U. Gennser, D. Mailly, F. Pierre, W. Wegscheider, P. Roche, Phys. Rev. Lett. 108, 256802 (2012)
  • 'Tuning Decoherence with a Voltage Probe', P. Roulleau, F. Portier, P. Roche, A. Cavanna, G. Faini, U. Gennser, D. Mailly, Phys. Rev. Lett. 102, 236802 (2009)
  • 'Direct Measurement of the Coherence Length of Edge States in the Integer Quantum Hall Regime', P. Roulleau, F. Portier, P. Roche, A. Cavanna, G. Faini, U. Gennser, D. Mailly, Phys. Rev. Lett. 100, 126802 (2008)
  • 'Noise Dephasing in Edge States of the Integer Quantum Hall Regime', P. Roulleau, F. Portier, P. Roche, A. Cavanna, G. Faini, U. Gennser, D. Mailly, Phys. Rev. Lett. 101, 186803 (2008)
  • 'Finite bias visibility of the electronic Mach-Zehnder interferometer', Preden Roulleau, F. Portier, D. C. Glattli, P. Roche, A. Cavanna, G. Faini, U. Gennser, D. Mailly, Phys. Rev. B 76, 161309 (2007)

Puce Highlights:


Nous contacter         Annuaire         Venir au C2N Marcoussis