Theory of charge transport in ferromagnetic semiconductor/s-wave superconductor junction

Autor:	Mizuno, Yoshihiro, Yokoyama, Takehito, Tanaka, Yukio
Rok vydání:	2009
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physc.2009.05.071
Popis:	We study tunneling conductance in ferromagnetic semiconductor/insulator/s-wave superconductor junction where Rashba spin-orbit interaction (RSOI) and exchange field are taken into account in the ferromagnetic semiconductor. We show that normalized conductance at zero voltage has a maximum as a function of RSOI for high transparent interface and finite exchange field. This is because Andreev reflection probability shows a nonmonotonic dependence on RSOI in the presence of the exchange field. On the other hand, for intermediate transparent interface, normalized conductance at zero voltage has a reentrant shape at zero or small exchange field with increasing RSOI but is monotonically increasing by RSOI at large exchange field. Comment: 6 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0906.4244 Zobrazit plný text záznamu View this record from Arxiv