Electric modulation of supercurrent in triplet Josephson junction
Department of Physics, Southeast University - Nanjing 210096, China
2 College of Science, Nanjing University of Post and Telecommunications - Nanjing 210096, China
Accepted: 20 September 2010
We study the electric control of the Josephson current flowing in a clean triplet superconductor (TS) junction with a two-dimensional electron gas (2DEG) layer between two leads. The Rashba spin-orbit coupling (RSOC) is considered in the 2DEG region and its strength can be altered by an external electric field. Since the TS Cooper pairs can achieve a spin precession phase due to the pseudomagnetic field from RSOC when they travel in the 2DEG region, the Josephson current exhibits a regular 0-π oscillation, abrupt current reversal effect, and an unusual temperature dependence. Our findings may provide a purely electric means to control the Josephson current.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 74.50.+r – Tunneling phenomena; Josephson effects
© EPLA, 2010