Abstract
The electronic transport properties of a gated vertical quantum dot fabricated of an asymmetrical InGaAs/AlGaAs double-barrier resonant tunneling heterostructure are studied experimentally. At a temperature of 15 mK, a series of small current peaks are observed far below the voltage of a main resonance peak. The voltage position of these peaks appeared to be strongly dependent on the presence of magnetic field oriented perpendicular to the plane of the barriers. The occurrence of the peaks is attributed to tunneling mechanisms involving inter-Landau-level resonant tunneling, longitudinal-optical (LO)-phonon-assisted tunneling and to electrostatic effects such as Coulomb blockade.
| Original language | English |
|---|---|
| Pages (from-to) | 1630-1632 |
| Number of pages | 3 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 40 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2008 Mar 1 |
| Externally published | Yes |
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Keywords
- Magnetospectrum
- Semiconductor quantum dot
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
Cite this
Fine structure in magnetospectrum of vertical quantum dot. / Agafonov, Oleksiy B.; Kita, Tomohiro; Ohno, Hideo; Haug, Rolf J.
In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 40, No. 5, 01.03.2008, p. 1630-1632.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fine structure in magnetospectrum of vertical quantum dot
AU - Agafonov, Oleksiy B.
AU - Kita, Tomohiro
AU - Ohno, Hideo
AU - Haug, Rolf J.
PY - 2008/3/1
Y1 - 2008/3/1
N2 - The electronic transport properties of a gated vertical quantum dot fabricated of an asymmetrical InGaAs/AlGaAs double-barrier resonant tunneling heterostructure are studied experimentally. At a temperature of 15 mK, a series of small current peaks are observed far below the voltage of a main resonance peak. The voltage position of these peaks appeared to be strongly dependent on the presence of magnetic field oriented perpendicular to the plane of the barriers. The occurrence of the peaks is attributed to tunneling mechanisms involving inter-Landau-level resonant tunneling, longitudinal-optical (LO)-phonon-assisted tunneling and to electrostatic effects such as Coulomb blockade.
AB - The electronic transport properties of a gated vertical quantum dot fabricated of an asymmetrical InGaAs/AlGaAs double-barrier resonant tunneling heterostructure are studied experimentally. At a temperature of 15 mK, a series of small current peaks are observed far below the voltage of a main resonance peak. The voltage position of these peaks appeared to be strongly dependent on the presence of magnetic field oriented perpendicular to the plane of the barriers. The occurrence of the peaks is attributed to tunneling mechanisms involving inter-Landau-level resonant tunneling, longitudinal-optical (LO)-phonon-assisted tunneling and to electrostatic effects such as Coulomb blockade.
KW - Magnetospectrum
KW - Semiconductor quantum dot
UR - http://www.scopus.com/inward/record.url?scp=39649122093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=39649122093&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2007.10.006
DO - 10.1016/j.physe.2007.10.006
M3 - Article
VL - 40
SP - 1630
EP - 1632
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 5
ER -