Persistent current of relativistic electrons on a Dirac ring in presence of impurities
Type
ArticleAuthors
Ghosh, SumitSaha, Arijit
KAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Date
2014-08-01Online Publication Date
2014-08-01Print Publication Date
2014-08Permanent link to this record
http://hdl.handle.net/10754/594300
Metadata
Show full item recordAbstract
We study the behaviour of persistent current of relativistic electrons on a one dimensional ring in presence of attractive/repulsive scattering potentials. In particular, we investigate the persistent current in accordance with the strength as well as the number of the scattering potential. We find that in presence of single scatterer the persistent current becomes smaller in magnitude than the scattering free scenario. This behaviour is similar to the non-relativistic case. Even for a very strong scattering potential, finite amount of persistent current remains for a relativistic ring. In presence of multiple scatterer we observe that the persistent current is maximum when the scatterers are placed uniformly compared to the current averaged over random configurations. However if we increase the number of scatterers, we find that the random averaged current increases with the number of scatterers. The latter behaviour is in contrast to the non-relativistic case. © 2014 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.Citation
Ghosh S, Saha A (2014) Persistent current of relativistic electrons on a Dirac ring in presence of impurities. Eur Phys J B 87. Available: http://dx.doi.org/10.1140/epjb/e2014-50223-1.Sponsors
S.G. likes to acknowledge the financial support by the CSIR, India. The work of A.S. has been supported by the Swiss NSF, NCCR Nanoscience, and NCCR QSIT.Publisher
Springer NatureJournal
The European Physical Journal BarXiv
1308.4071ae974a485f413a2113503eed53cd6c53
10.1140/epjb/e2014-50223-1