Neutron-Scattering Study of the 38- and 54-K Phase Transitions in Deuterated Tetrathiafulvalene- Tetracyanoquinodimethane (TTF-TCNQ)

1 December 1975

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 35 (22) , 1518-1521
https://doi.org/10.1103/physrevlett.35.1518

Abstract

Neutron-elastic-scattering experiments performed on deuterated TTF-TCNQ single crystals reveal two structural transformations at 38 ± 0.5 K and at 54 ± 1.0 K. Below 38 K, a

4 \vec{a} \times 3.4 \vec{b} \times \vec{c}

modulation relative to the underlying undistorted lattice is established. At 38 K the modulation period in the

\vec{a}

direction becomes incommensurate and displays an abrupt decrease from its low-temperature value of

4 \vec{a}

and gradually decreases with increasing temperature to

2 \vec{a}

near 51 K.

Keywords

This publication has 7 references indexed in Scilit:

X-Ray-Diffuse-Scattering Evidence for a Phase Transition in Tetrathiafulvalene Tetracyanoquinodimethane (TTF-TCNQ)
Physical Review Letters, 1975
Neutron-scattering study of the "one-dimensional" conductor $K_{2}$ Pt ${(CN)}_{4}$ ${Br}_{0.3}$ .3.2 $D_{2}$ O (KCP)
Physical Review B, 1975
On the crystallography of the TTF-TCNQ salt at reduced temperatures
Solid State Communications, 1974
Neutron-Scattering Study of the Structural Phase Transition in the One-Dimensional Conductor $K_{2}$ Pt ${(CN)}_{4}$ ${Br}_{0.3}$ ${\cdot 3 D}_{2}$ O
Physical Review Letters, 1974
The crystal structure of the 1:1 radical cation–radical anion salt of 2,2'-bis-l,3-dithiole (TTF) and 7,7,8,8-tetracyanoquinodimethane (TCNQ)
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1974
Pressure investigation of the metal-semiconductor transition in TTF-TCNQ
Journal de Physique Lettres, 1974
A Low‐Temperature Phase Transition in the One‐Dimensional Conductor K₂Pt(CN)₄Br_0.30 ·x H₂O
Physica Status Solidi (b), 1973