Transport through short quantum wires
| dc.creator | Schmeltzer, D. | |
| dc.date | 2002-11-21 | |
| dc.date | 2002-12-19 | |
| dc.date.accessioned | 2026-07-07T02:48:18Z | |
| dc.date.available | 2026-07-07T02:48:18Z | |
| dc.description | At temperatures $T < {\hbar v_F}/{K_B d} \equiv T^{wire}$ the collective excitations are negligible and the spectrum of the short wire is dominated by the ''zero modes'' particle excitations. At temperature $ T > T^{wire}$ a spin polarized state controlled by the electron-electron interaction and electron density is identified at short times. As a result the anomaly in the conductance $G > 2 \times 0.5 {e^2}/{h} $ appears. At $T \to 0$ by varying the gate voltage we find that our problem is equivalent to a resonant impurity level. As a result perfect transmission with a conductance $G \simeq \frac{2 e^2}{h}$ is obtained. The model presented here can be used as a spin filter which operate by varying the temperature. Transport through a short quantum wire with electron-electron interaction and length ``$d$'' coupled to Luttinger leads is considered. The short wire model might explain the ``0.7 anomaly'' observed in quantum point contacts. | |
| dc.description | 10 pages | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0211490 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0211490 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20352 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Transport through short quantum wires | |
| dc.type | text |