Anomalous Josephson Current in Junctions with Spin-Polarizing Quantum Point Contacts

Autor:	Reynoso, A. A., Usaj, Gonzalo, Balseiro, C. A., Feinberg, D., Avignon, M.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. Lett. 101, 107001 (2008)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.101.107001
Popis:	We consider a ballistic Josephson junction with a quantum point contact in a two-dimensional electron gas with Rashba spin-orbit coupling. The point contact acts as a spin filter when embedded in a circuit with normal electrodes. We show that with an in-plane external magnetic field an anomalous supercurrent appears even for zero phase difference between the superconducting electrodes. In addition, the external field induces large critical current asymmetries between the two flow directions, leading to supercurrent rectifying effects. Comment: 4 pages, 4 figures, to appear in PRL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0808.1516 Zobrazit plný text záznamu View this record from Arxiv