2002/01/26 by Sam Young Cho, Ross H. McKenzie, Kicheon Kang +1
Chemistry · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Chemistry #Condensed matter physics #Electron #Optoelectronics #Physics #Polarization (electrochemistry) #Quantum and electron transport phenomena #Quantum dot #Quantum dot laser #Quantum mechanics #Quantum tunnelling #Semiconductor #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/15/7/311
4 pages, 4 figures
arxiv created 2002/01/26 · openalex publication_date 2003/02/10 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We investigate coherent electron transport through a parallel circuit of two quantum dots (QDs), each of which has a single tunable energy level. Electrons tunnelling via each dot from the left lead interfere with each other at the right lead. It is shown that due to the quantum interference of tunnelling electrons the double QD device is magnetically polarized by coherent circulation of electrons on the closed path through the dots and the leads. By varying the energy level of each dot one can make the magnetic states of the device be up- , non- or down -polarized. It is shown that for experimentally accessible temperatures and applied biases the magnetic polarization currents should be sufficiently large to observe with current nanotechnology.