Abstract
A remarkable nonlinearity and a switching effect have been observed for electric transport in a tetrathiafulvalene (TTF)--chloranil crystal. Experimental evidence indicates that these features are of an intrinsic origin associated with the neutral-ionic transition. A possible mechanism is discussed in terms of field-dependent low-energy excitations, such as solitons and neutral-ionic domain walls, which are inherent to the quasi-one-dimensional donor-acceptor stacks in the TTF--chloranil crystal.
- Received 22 October 1987
DOI:https://doi.org/10.1103/PhysRevB.38.2215
©1988 American Physical Society