Figure. Direction dependence of tunnel spectrum of organic superconductivity.
This spectrum is corresponding to d-wave symmetry.
Anisotropic superconductivity
Two dimensional organic superconductor ƒÈ-(BEDT-TTF)2X exhibits superconductivity transition at about 10 K. Tunnel spectroscopic measurement using a scanning tunneling microscopy (STM) clarified that superconductivity gap depends on the direction, and has d-wave anisotropic structure. This result shows that mechanism of this superconductivity is based on magnetic interaction, which is different from conventional one (BCS type).
Figure. Direction dependence of tunnel spectrum of organic superconductivity.
This spectrum is corresponding to d-wave symmetry.
One dimensional organic superconductor (TMTSF)2X has been indicated the possibility of spin triplet superconductivity.
We aim to clarify the mechanism of anisotropic superconductivity by developing
ultra low temperature STM working below 1 K.
