Ghosh, A;
Ford, CJB;
Pepper, M;
Beere, HE;
Ritchie, DA;
(2004)
Possible evidence of a spontaneous spin polarization in mesoscopic two-dimensional electron systems.
PHYS REV LETT
, 92
(11)
, Article 116601. 10.1103/PhysRevLett.92.116601.
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Abstract
We have experimentally studied the nonequilibrium transport in low-density clean two-dimensional (2D) electron systems at mesoscopic length scales. At zero magnetic field (B), a double-peak structure in the nonlinear conductance was observed close to the Fermi energy in the localized regime. From the behavior of these peaks at nonzero B, we could associate them with the opposite spin states of the system, indicating a spontaneous spin polarization at B=0. Detailed temperature and disorder dependence of the structure shows that such a splitting is a ground-state property of low-density 2D systems.
| Type: | Article |
|---|---|
| Title: | Possible evidence of a spontaneous spin polarization in mesoscopic two-dimensional electron systems |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.92.116601 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.92.116601 |
| Language: | English |
| Additional information: | © 2004 The American Physical Society |
| Keywords: | QUANTUM-DOT, GAS, HETEROSTRUCTURES, STATE |
| 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/1314378 |
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