Nonlinear electric transport and switching phenomenon in the mixed-stack charge-transfer crystal tetrathiafulvalene-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi></math></span>-chloranil

Yoshinori Tokura; Hiroshi Okamoto; Takao Koda; Tadaoki Mitani; Gunzi Saito

doi:10.1103/PhysRevB.38.2215

Rapid Communication

Nonlinear electric transport and switching phenomenon in the mixed-stack charge-transfer crystal tetrathiafulvalene- $p$ -chloranil

Yoshinori Tokura, Hiroshi Okamoto, Takao Koda, Tadaoki Mitani, and Gunzi Saito

Phys. Rev. B 38, 2215(R) – Published 15 July 1988

Abstract

A remarkable nonlinearity and a switching effect have been observed for electric transport in a tetrathiafulvalene (TTF)- $p$ -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- $p$ -chloranil crystal.