| Issue |
Europhys. Lett.
Volume 44, Number 2, October II 1998
|
|
|---|---|---|
| Page(s) | 222 - 228 | |
| Section | Condensed matter: electronic structure, electrical, magneticand optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00460-0 | |
| Published online | 01 September 2002 | |
Spontaneously broken time-reversal symmetry in quantum dots
Institut für Theoretische Physik, Universität Regensburg - D-93040 Regensburg, Germany
Received:
30
July
1998
Accepted:
4
September
1998
We present current-spin density-functional calculations for circular parabolic quantum dots in zero magnetic field. We find the possibility for broken time-reversal symmetry via exchange correlation with spontaneously induced orbital currents. For certain electron numbers, this results in new current textures which give rise to a finite magnetization even for ground states with vanishing total angular momentum.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilattices) / 71.15.Mb – Density functional theory, local density approximation / 73.23.-b – Mesoscopic systems
© EDP Sciences, 1998
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