| Issue |
EPL
Volume 129, Number 4, February 2020
|
|
|---|---|---|
| Article Number | 47002 | |
| Number of page(s) | 7 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/129/47002 | |
| Published online | 23 March 2020 | |
Flux-driven circular current and near-zero field magnetic response in an Aubry ring: High-to-low conducting switching action
1 Physics and Applied Mathematics Unit, Indian Statistical Institute - 203 Barrackpore Trunk Road, Kolkata-700 108, India
2 Center for Integrated Nanostructure Physics, Institute of Basic Science, Department of Energy Science, Sungkyunkwan University - Suwon-440 746, Korea
(a) santanu.maiti@isical.ac.in
Received: 16 October 2019
Accepted: 2 March 2020
We explore the phenomenon of flux-driven circular current in a mesoscopic conducting ring where site energies are modulated in the cosine form following the well-known Aubry-André-Harper (AAH) model. Due to unique and diverse characteristic features of AAH potential several atypical features of persistent current are found, associated with the electron filling and AAH phase factor. Finally, a transition from a conducting phase to an insulating one upon the variation of AAH modulation strength is discussed by studying Drude weight. Our analysis might be useful to examine the magnetic response of any other similar class of aperiodic lattices.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.23.Ra – Persistent currents / 71.30.+h – Metal-insulator transitions and other electronic transitions
© EPLA, 2020
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