Volume 124, Number 4, November 2018
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||10 December 2018|
Modulations of chiral order parameters in mesoscopic p-wave superconducting square systems
1 Department of Physics, Shanghai University - Shanghai 200444, China
2 Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University - Shanghai 200444, China
Received: 8 August 2018
Accepted: 14 November 2018
The modulations of order parameters in mesoscopic chiral p-wave superconducting square systems are investigated by numerically solving the Bogoliubov-de Gennes equations self-consistently. For a perfect square, a chiral domain wall tends to emerge along the horizontal direction of the sample center, while the suppression of magnitude for orders is presented in different diagonal directions for a square loop with a centered square hole. When a single non-magnetic impurity is involved into the loop system, the gap parameter is strongly modified with tuning flux for finite impurity strength. Particularly, an impurity-induced intermediate state with asymmetric feature of the order-parameter distributions shows up stably. Due to the appearance of energy jumps at the points of phase transitions, pronounced sawtooth-like patterns of the currents are induced, which are highly sensitive to the located impurity site.
PACS: 74.78.Na – Mesoscopic and nanoscale systems / 74.20.Fg – BCS theory and its development
© EPLA, 2018
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