Investigation of Superconductivity in Molecular Conductors Using Strain-Controlled Field-Effect Transistors

Abstract

In this article, we review the effect of strain on an organic field effect transistor with superconducting channel. Molecular conductors laminated on substrates experience significant biaxial strain via thermal contraction of the substrates, resulting in the electronic phase transitions at low temperatures. Furthermore, bending of the substrate enables continuous control of uniaxial strain without a pressure medium. This method in combination with field-effect doping allows one to investigate the superconducting phase diagram in the effective bandfilling-bandwidth parameter space.