Ai Yamakage, Masatoshi Sato, Satoshi Kashiwaya, Yukio Tanaka
We study the Josephson effect in superconducting topological insulator (STI) by referring to the pairing states of Cu-doped Bi2Se3. The current-phase relation of a junction between even-parity superconductors and STI shows the robust vanishment of the first order component, J({\phi}) \sim sin(2{\phi}), due to the mirror symmetry of the system. Furthermore, we clarify that the temperature dependence of critical current in junctions consisting of two STIs changes qualitatively depending on the relative spin-helicity of the two surface Andreev bound states. Detecting of these features qualifies as a distinct experimental evidence for the Majorana nature of the Andreev bound states.
View original:
http://arxiv.org/abs/1208.5306
No comments:
Post a Comment