Details
| Original language | English |
|---|---|
| Article number | 196601 |
| Journal | Physical review letters |
| Volume | 90 |
| Issue number | 19 |
| Publication status | Published - 14 May 2003 |
Abstract
A small quantum ring with less than ten electrons was studied by transport spectroscopy. For strong coupling to the leads a Kondo effect is observed and used to characterize the spin structure of the system in a wide range of magnetic fields. At small magnetic fields Aharonov-Bohm oscillations influenced by Coulomb interaction appear. They exhibit phase jumps by [Formula presented] at the Coulomb-blockade resonances. Inside Coulomb-blockade valleys the Aharonov-Bohm oscillations can also be studied due to the finite conductance caused by the Kondo effect. Astonishingly, the maxima of the oscillations show linear shifts with increasing magnetic field and gate voltage.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 90, No. 19, 196601, 14.05.2003.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Kondo Effect in a Few-Electron Quantum Ring
AU - Keyser, U. F.
AU - Fühner, C.
AU - Borck, S.
AU - Haug, R. J.
AU - Bichler, M.
AU - Abstreiter, G.
AU - Wegscheider, W.
PY - 2003/5/14
Y1 - 2003/5/14
N2 - A small quantum ring with less than ten electrons was studied by transport spectroscopy. For strong coupling to the leads a Kondo effect is observed and used to characterize the spin structure of the system in a wide range of magnetic fields. At small magnetic fields Aharonov-Bohm oscillations influenced by Coulomb interaction appear. They exhibit phase jumps by [Formula presented] at the Coulomb-blockade resonances. Inside Coulomb-blockade valleys the Aharonov-Bohm oscillations can also be studied due to the finite conductance caused by the Kondo effect. Astonishingly, the maxima of the oscillations show linear shifts with increasing magnetic field and gate voltage.
AB - A small quantum ring with less than ten electrons was studied by transport spectroscopy. For strong coupling to the leads a Kondo effect is observed and used to characterize the spin structure of the system in a wide range of magnetic fields. At small magnetic fields Aharonov-Bohm oscillations influenced by Coulomb interaction appear. They exhibit phase jumps by [Formula presented] at the Coulomb-blockade resonances. Inside Coulomb-blockade valleys the Aharonov-Bohm oscillations can also be studied due to the finite conductance caused by the Kondo effect. Astonishingly, the maxima of the oscillations show linear shifts with increasing magnetic field and gate voltage.
UR - http://www.scopus.com/inward/record.url?scp=85038320416&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.90.196601
DO - 10.1103/PhysRevLett.90.196601
M3 - Article
AN - SCOPUS:85038320416
VL - 90
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 19
M1 - 196601
ER -