Evolution of ferroelectricity in tetrathiafulvalene-p-chloranil as a function of pressure and temperature
Journal Article
·
· Journal of Chemical Physics
- 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany)
The neutral-to-ionic phase transition in the mixed-stack charge-transfer complex tetrathiafulvalene-p-chloranil (TTF-CA) has been studied by pressure-dependent infrared spectroscopy up to p = 11 kbar and down to low temperatures, T = 10 K. By tracking the C=O antisymmetric stretching mode of CA molecules, we accurately determine the ionicity of TTF-CA in the pressure-temperature phase diagram. At any point, the TTF-CA crystal bears only a single ionicity; there is no coexistence region or an exotic high-pressure phase. Our findings shed new light on the role of electron-phonon interaction in the neutral-ionic transition.
- OSTI ID:
- 22311389
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 24 Vol. 140; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
One-Dimensional Fluctuating Nanodomains in the Charge-Transfer Molecular System TTF-CA and their First-Order Crystallization
Solvent-drop Assisted Mechanochemical Synthesis of the Black and Green Polymorphs of the Tetrathiafulvalene-chloranil Charge Transfer Salt
Neutral-ionic transitions in organic mixed-stack compounds
Journal Article
·
Fri May 26 00:00:00 EDT 2006
· Physical Review Letters
·
OSTI ID:20777252
Solvent-drop Assisted Mechanochemical Synthesis of the Black and Green Polymorphs of the Tetrathiafulvalene-chloranil Charge Transfer Salt
Journal Article
·
Fri Dec 30 23:00:00 EST 2011
· Synthetic Metals
·
OSTI ID:1042318
Neutral-ionic transitions in organic mixed-stack compounds
Journal Article
·
Fri Dec 31 23:00:00 EST 1982
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6237033