Details
| Original language | English |
|---|---|
| Pages (from-to) | 1258-1260 |
| Number of pages | 3 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 40 |
| Issue number | 5 |
| Publication status | Published - 18 Sept 2007 |
Abstract
We investigated two-dimensional electron- (2DES) and hole systems (2DHS) in the fractional quantum Hall regime for filling factors ν=1/3 and ν=2/3. Due to a metallic top gate we are able to vary the electron-/hole density of the samples over a wide range. Measuring activated transport on these systems with perpendicular magnetic fields up to 18 T and temperatures down to about 30 mK allows to get an insight into the excitation spectra. Although the bandstructure of holes is complicated compared to those of electrons, the theoretical description of the fractional quantum Hall effect in the composite Fermion picture should hold for both types of particles. We analyzed and compared the results for the different filling factors and systems.
Keywords
- 2D electron gas, 2D hole gas, Activation energy, Fractional quantum Hall effect, Magneto-transport
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 40, No. 5, 18.09.2007, p. 1258-1260.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A comparison
T2 - 2D electron- and hole systems in the fractional quantum Hall regime
AU - Hadzibrahimovic, Adriana
AU - Dethlefsen, Annelene F.
AU - Reuter, Dirk
AU - Wieck, Andreas D.
AU - Tranitz, Hans Peter
AU - Wegscheider, Werner
AU - Haug, Rolf J.
N1 - Funding information: We acknowledge discussions with Karel Výborný and financial support from the DFG via the priority program “Quantum Hall Systems”.
PY - 2007/9/18
Y1 - 2007/9/18
N2 - We investigated two-dimensional electron- (2DES) and hole systems (2DHS) in the fractional quantum Hall regime for filling factors ν=1/3 and ν=2/3. Due to a metallic top gate we are able to vary the electron-/hole density of the samples over a wide range. Measuring activated transport on these systems with perpendicular magnetic fields up to 18 T and temperatures down to about 30 mK allows to get an insight into the excitation spectra. Although the bandstructure of holes is complicated compared to those of electrons, the theoretical description of the fractional quantum Hall effect in the composite Fermion picture should hold for both types of particles. We analyzed and compared the results for the different filling factors and systems.
AB - We investigated two-dimensional electron- (2DES) and hole systems (2DHS) in the fractional quantum Hall regime for filling factors ν=1/3 and ν=2/3. Due to a metallic top gate we are able to vary the electron-/hole density of the samples over a wide range. Measuring activated transport on these systems with perpendicular magnetic fields up to 18 T and temperatures down to about 30 mK allows to get an insight into the excitation spectra. Although the bandstructure of holes is complicated compared to those of electrons, the theoretical description of the fractional quantum Hall effect in the composite Fermion picture should hold for both types of particles. We analyzed and compared the results for the different filling factors and systems.
KW - 2D electron gas
KW - 2D hole gas
KW - Activation energy
KW - Fractional quantum Hall effect
KW - Magneto-transport
UR - http://www.scopus.com/inward/record.url?scp=39649119401&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2007.08.124
DO - 10.1016/j.physe.2007.08.124
M3 - Article
AN - SCOPUS:39649119401
VL - 40
SP - 1258
EP - 1260
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 5
ER -