کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1859280 | 1530599 | 2013 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mobility edge phenomenon in a Hubbard chain: A mean field study Mobility edge phenomenon in a Hubbard chain: A mean field study](/preview/png/1859280.png)
• Mobility edge phenomenon has been analyzed in a 1D superlattice geometry.
• The results have been evaluated within a Hartree–Fock mean field level.
• The sensitivity of MI transition on the electric field variation has been discussed.
• The model quantum system can be used as a tailor made switching device.
We show that a tight-binding one-dimensional chain composed of interacting and non-interacting atomic sites can exhibit multiple mobility edges at different values of carrier energy in presence of external electric field. Within a mean field Hartree–Fock approximation we numerically calculate two-terminal transport by using Greenʼs function formalism. Several cases are analyzed depending on the arrangements of interacting and non-interacting atoms in the chain. The analysis may be helpful in designing mesoscale switching devices.
Journal: Physics Letters A - Volume 377, Issues 16–17, 15 July 2013, Pages 1205–1209