Volume 102, Number 5, June 2013
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 June 2013|
Majorana states in a p-wave superconducting ring
1 Department of Electrophysics, National Chiao Tung University - Hsinchu, Taiwan, ROC
2 Physics Department, Ariel University Center of Samaria - Ariel 40700, Israel
3 Department of Physics, Institute of Superconductivity, Bar-Ilan University - Ramat-Gan 52900, Israel
Received: 6 December 2012
Accepted: 11 May 2013
The spectrum of excitations of the chiral superconducting ring with internal and external radii Ri, Re (comparable with coherence length ξ) trapping a unit flux Φ0 is calculated. We find within the Bogoliubov-de Gennes approach that there exists a pair of precisely zero-energy states when 2k⊥(Re − Ri)/π is integer (here k⊥ is the momentum component in the disk plane while k⊥ξ > 1). They are not protected by topology, but are stable under certain deformations of the system. We discuss the ways to tune the system so that it grows into such a “Majorana disk”. This condition has a character of a resonance phenomenon.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave)
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.