Abstract
DNA electronics has reattracted great interest in recent years and showed a number of fascinating phenomena. Here, we present a theoretical study of electron transport through a two-terminal circular DNA junction under a perpendicular magnetic field. Our results indicate that this circular DNA exhibits Aharonov–Bohm-like effects and a semiconductor–insulator–semiconductor transition by tuning this magnetic field, with the transmission spectrum nearly oscillating periodically. Interestingly, Fano resonances appear around integer multiples of the magnetic flux quantum accompanied by several vortices of local currents. Moreover, the circular DNA behaves as a nanoscale switch, and this switching effect is robust and could be improved for longer molecular length and weaker molecule–electrode coupling, with the on/off ratio exceeding 104 for long circular DNA. These results may help for designing novel circular DNA-based molecular devices.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
