Details
| Original language | English |
|---|---|
| Pages (from-to) | 331-334 |
| Number of pages | 4 |
| Journal | Physica Status Solidi (B) Basic Research |
| Volume | 238 |
| Issue number | 2 |
| Publication status | Published - 25 Jun 2003 |
Abstract
We investigate a small tuneable quantum ring fabricated by direct local oxidation using an atomic force microscope. The device contains very few electrons and is tuned into the Kondo regime. We study this Kondo effect by temperature dependent measurements. At finite bias voltages we observe additional peaks. These vanish with increasing temperature indicating Kondo correlations for these excited states. Additionally, the geometry of our device allows to study Aharonov-Bohm oscillations in the Kondo regime for a device containing less than ten electrons. We observe a modulation of the Kondo effect with a reduced Aharonov-Bohm period explained by electron-electron interaction in our small quantum ring.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica Status Solidi (B) Basic Research, Vol. 238, No. 2, 25.06.2003, p. 331-334.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Aharonov-Bohm effect of a quantum ring in the Kondo regime
AU - Keyser, U. F.
AU - Fühner, C.
AU - Haug, R. J.
AU - Wegscheider, W.
AU - Bichler, M.
AU - Abstreiter, G.
PY - 2003/6/25
Y1 - 2003/6/25
N2 - We investigate a small tuneable quantum ring fabricated by direct local oxidation using an atomic force microscope. The device contains very few electrons and is tuned into the Kondo regime. We study this Kondo effect by temperature dependent measurements. At finite bias voltages we observe additional peaks. These vanish with increasing temperature indicating Kondo correlations for these excited states. Additionally, the geometry of our device allows to study Aharonov-Bohm oscillations in the Kondo regime for a device containing less than ten electrons. We observe a modulation of the Kondo effect with a reduced Aharonov-Bohm period explained by electron-electron interaction in our small quantum ring.
AB - We investigate a small tuneable quantum ring fabricated by direct local oxidation using an atomic force microscope. The device contains very few electrons and is tuned into the Kondo regime. We study this Kondo effect by temperature dependent measurements. At finite bias voltages we observe additional peaks. These vanish with increasing temperature indicating Kondo correlations for these excited states. Additionally, the geometry of our device allows to study Aharonov-Bohm oscillations in the Kondo regime for a device containing less than ten electrons. We observe a modulation of the Kondo effect with a reduced Aharonov-Bohm period explained by electron-electron interaction in our small quantum ring.
UR - http://www.scopus.com/inward/record.url?scp=0042413995&partnerID=8YFLogxK
U2 - 10.1002/pssb.200303074
DO - 10.1002/pssb.200303074
M3 - Article
AN - SCOPUS:0042413995
VL - 238
SP - 331
EP - 334
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
SN - 0370-1972
IS - 2
ER -