Sigrist, Martin and Fuhrer, A. and Ihn, Thomas and Ensslin, Klaus and Ulloa, S. E. and Wegscheider, Werner and Bichler, Max
Magnetic-Field-Dependent Transmission Phase of a Double-Dot System in a Quantum Ring.
Physical Review Letters 93 (6), 066802.
The Aharonov-Bohm effect is measured in a four-terminal open ring geometry. Two quantum dots are embedded in the structure, one in each of the two interfering paths. The number of electrons in the two dots can be controlled independently. The transmission phase is measured as electrons are added to or taken away from the individual quantum dots. Although the measured phase shifts are in qualitative agreement with theoretical predictions, the phase evolution exhibits unexpected dependence on the magnetic field. Phase lapses are found only in certain ranges of the magnetic field.
|Date:||6 August 2004|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
| 73.21.La, 73.23.Hk||PACS|
|Keywords:||aluminium compounds, gallium arsenide, III-V semiconductors, two-dimensional hole gas, semiconductor quantum wells, absorption coefficients, spin-spin relaxation, spin polarised transport|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||11 Jan 2010 13:06|
|Last Modified:||20 Jul 2011 22:13|