Surendra B. Anantharaman, Joachim Kohlbrecher, et al.
MRS Fall Meeting 2020
New spin-susceptibility data, determined by electron-spin resonance on single crystals, are reported below the 53-K metal-semiconductor transition in tetrathiafulvalene-tetracyanoquinodimethane, TTF-TCNQ. The measured susceptibility is decomposed into the TTF and TCNQ contributions. Each of these contributions behave differently through the 38- and 53-K phase transitions, allowing us to determine the respective roles of the two stacks in these transitions. We conclude that the TCNQ stack drives the transition at 53 K and that the TTF stack susceptibility is most affected by the 38-K transition. In addition, the temperature dependence of the TTF spin susceptibility is compared to that of the dc conductivity on samples from the same batch. We find that for T<38 K their activation energies are quite different, ∼ 100-125 K for the susceptibility and ∼ 220 K for the conductivity, which is believed to be primarily on the TTF stack. Three explanations are offered to account for this difference in activation energies: (a) intramolecular Coulomb energies are significant for the TTF stack, (b) the mobility of electrons on the TTF stack is activated, and (c) existence of microdomains and amplitude solitons. © 1977 The American Physical Society.
Surendra B. Anantharaman, Joachim Kohlbrecher, et al.
MRS Fall Meeting 2020
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
Kenneth R. Carter, Robert D. Miller, et al.
Macromolecules
Lawrence Suchow, Norman R. Stemple
JES