Nonlinear conductivity with an extremely small threshold electric field in the organic conductor (TSM-TTP)(I3)5/3
Abstract
(TSM-TTP)(I3)5/3 is a 1/6 -filled one-dimensional system composed of an extended donor molecule which has two tetrathiafulvalene (TTF) units in a molecule, where TSM-TTP is 2,5-bis[4,5-bis(methylseleno)-1,3-dithiol-2-ylidene]-1,3,4,6-tetrathiapentalene. Nonlinear conductivity is observed in the insulating state below 20K , and the metallic state is restored above a very small threshold electric field of 0.3V/cm at 4.2K . The extremely sensitive nonlinearity is ascribed to the inhomogeneous insulating state generated by the weak and disordered anion potentials on the otherwise highly conducting intramolecular charge order state in the double-TTF molecule.
- Publication:
-
Physical Review B
- Pub Date:
- June 2007
- DOI:
- 10.1103/PhysRevB.75.235103
- Bibcode:
- 2007PhRvB..75w5103M
- Keywords:
-
- 72.80.Le;
- 74.70.Kn;
- 71.30.+h;
- Polymers;
- organic compounds;
- Organic superconductors;
- Metal-insulator transitions and other electronic transitions