Kumar, S;
Pepper, M;
Ritchie, D;
Farrer, I;
Montagu, H;
(2019)
Formation of a non-magnetic, odd-denominator fractional quantized conductance in a quasi-one-dimensional electron system.
Applied Physics Letters
, 115
, Article 123104. 10.1063/1.5121147.
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Abstract
We have investigated the transport properties of a two-dimensional electron gas confined to one dimension by voltages applied to a pair of split gates and an additional top gate deposited on the surface of the GaAs/AlGaAs heterostructure. At low carrier concentrations, <5 1010 cm2, in a wide 1D channel (700 nm), with an asymmetric confinement potential, the conductance plateaux in units of e2 /h at 1 and 2/3 were observed. In the presence of a fixed in-plane magnetic field of 10 T, additional plateaux at 2/5 and 2/7 appeared with increasing asymmetry in confinement potential. The appearance of odd-denominator fractional states seems to originate from the zigzag formed when electrons are allowed to relax in the second dimension at the boundary of the 1D-2D transition
| Type: | Article |
|---|---|
| Title: | Formation of a non-magnetic, odd-denominator fractional quantized conductance in a quasi-one-dimensional electron system |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.5121147 |
| Publisher version: | https://doi.org/10.1063/1.5121147 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10081982 |
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