𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Spin-polarized resonant tunneling through two coupled quantum dots

✍ Scribed by P. Trocha; J. Barnaś

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
174 KB
Volume
3
Category
Article
ISSN
1862-6351

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Resonant electronic transport through two coupled non‐interacting single‐level quantum dots attached to ferromagnetic leads with collinear magnetizations is analyzed theoretically. Coupling of the dots to external leads as well as the inter‐dot coupling are assumed to be spin dependent. Basic transport characteristics, including current‐voltage curves, linear and nonlinear conductance, and tunnel magnetoresistance associated with magnetization rotation are calculated using the Green function technique. The relevant Green functions have been calculated by the equation of motion method. Variation of the transport characteristics with such system parameters like energy level position, spin polarization of the leads, and coupling between the dots has been calculated numerically. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

📜 SIMILAR VOLUMES

Superluminal optical soliton via resonan
Superluminal optical soliton via resonant tunneling in coupled quantum dots
✍ J. Li; J. Liu; X. Yang 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 277 KB

We demonstrate the formation of superluminal optical soliton in an symmetry semiconductor double quantum dot (QD) driven coherently by a weak pulsed laser using the tunnel coupling. It is shown that the group velocity of the soliton can be larger than the vacuum light speed c, i.e., superluminal sol