Abstract
We consider the origin of striking resonances, observed in the low-temperature magneto-resistance of submicron-sized quantum dots. The magnetic-field positions of the resonances are correlated to the depopulation of Landau levels in the dots, while their amplitude can correspond to a near-complete reflection of the applied current. In order to determine the origin of these features, we formulate a model for edge-state scattering in quantum dots which properly accounts for the magnetic-field-dependent evolution of their self-consistent potential profile. The resonances are thus ascribed to a sudden increase in back scattering, mediated by edge states trapped inside the dot. A similar treatment which ignores the high-field evolution of the dot profile is unable to reproduce the resonances, which we therefore conclude provide an important demonstration of the role of self-consistent effects in mesoscopic systems.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 7477-7484 |
| Number of pages | 8 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 56 |
| Issue number | 12 |
| DOIs | |
| State | Published - Jan 1 1997 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Giant back-scattering resonances in edge-state transport through quantum dots. / Bird, J.; Stopa, M.; Connolly, K.; Pivin, D.; Ferry, D.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 56, No. 12, 01.01.1997, p. 7477-7484.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Giant back-scattering resonances in edge-state transport through quantum dots
AU - Bird, J.
AU - Stopa, M.
AU - Connolly, K.
AU - Pivin, D.
AU - Ferry, D.
PY - 1997/1/1
Y1 - 1997/1/1
N2 - We consider the origin of striking resonances, observed in the low-temperature magneto-resistance of submicron-sized quantum dots. The magnetic-field positions of the resonances are correlated to the depopulation of Landau levels in the dots, while their amplitude can correspond to a near-complete reflection of the applied current. In order to determine the origin of these features, we formulate a model for edge-state scattering in quantum dots which properly accounts for the magnetic-field-dependent evolution of their self-consistent potential profile. The resonances are thus ascribed to a sudden increase in back scattering, mediated by edge states trapped inside the dot. A similar treatment which ignores the high-field evolution of the dot profile is unable to reproduce the resonances, which we therefore conclude provide an important demonstration of the role of self-consistent effects in mesoscopic systems.
AB - We consider the origin of striking resonances, observed in the low-temperature magneto-resistance of submicron-sized quantum dots. The magnetic-field positions of the resonances are correlated to the depopulation of Landau levels in the dots, while their amplitude can correspond to a near-complete reflection of the applied current. In order to determine the origin of these features, we formulate a model for edge-state scattering in quantum dots which properly accounts for the magnetic-field-dependent evolution of their self-consistent potential profile. The resonances are thus ascribed to a sudden increase in back scattering, mediated by edge states trapped inside the dot. A similar treatment which ignores the high-field evolution of the dot profile is unable to reproduce the resonances, which we therefore conclude provide an important demonstration of the role of self-consistent effects in mesoscopic systems.
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UR - http://www.scopus.com/inward/citedby.url?scp=0000644309&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.56.7477
DO - 10.1103/PhysRevB.56.7477
M3 - Article
VL - 56
SP - 7477
EP - 7484
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 12
ER -