Journal ArticleDOI
Landau theory of phase transitions in TTF-TCNQ
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TLDR
In this article, several parameters of the Landau Free Energy Function of TTF-TCNQ are calculated from the crystal structure taking into account the atomic positions and realistic charge distributions.Abstract:
Several parameters of the Landau Free Energy Function of TTF-TCNQ are calculated from the crystal structure taking into account the atomic positions and realistic charge distributions. In particular, the parameters that determine the coupling between charge density waves and rotations (librons) on neighbouring chains are evaluated. The Free Energy Function is solved, and good agreement with the experimental observation of the 2 a period between 53 K and 48 K and its variation below this temperature, is obtained. The CDW-libron interaction seems to be responsible for this transverse period. The behaviour of C p in the vicinity of the two close phase transitions is studied. The Free Energy should possess several (up to four) Lifshitz points, for appropriate values of the parameters.read more
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Journal ArticleDOI
Organic conductors and superconductors
Denis Jérome,H. J. Schulz +1 more
TL;DR: In this article, the authors present the most salient developments of research on organic conductors and superconductors during the past 10 years, including lattice instability in TTF-TCNQ and related compounds, superconducting or antiferromagnetic instabilities in the (TMTSF) 2 X series.
Journal ArticleDOI
The electron-phonon coupling strength in TTF-TCNQ
TL;DR: In this article, an ab-initio calculation of the electron relaxation rates in TTF-TCNQ for one phonon and two-phonon processes, resulting from the linear and quadratic electron-photon coupling is performed.
Book ChapterDOI
Equilibrium Properties of TTF-TCNQ
Slaven Barišić,Aleksa Bjeliš +1 more
TL;DR: In this article, the authors discuss the thermodynamic properties of TTF-TCNQ, which is a prototype of organic conductors with two families of conducting chains and belongs to an even wider class of linear chain compounds which are currently attracting a lot of attention by their unusual properties.
Journal ArticleDOI
Bulk and boundary critical behavior at Lifshitz points
TL;DR: In this paper, a survey of boundary critical behavior atm-axial Lifshitz points is presented, showing that the semi-infinite field theories representing the corresponding surface universality classes in these two cases of perpendicular and parallel surface orientation differ crucially in their Hamiltonian's boundary terms and the implied boundary conditions.
References
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Journal ArticleDOI
Quantum theory of solids
Rudolf Peierls,Louis D. Roberts +1 more
TL;DR: In this article, the interaction of light with non-conducting crystals has been studied in the context of crystal lattices and its applications in general theory and applications, such as semi-conductivity and superconductivity.
Journal ArticleDOI
Electron transfer in a new highly conducting donor-acceptor complex
Journal ArticleDOI
Critical Behavior at the Onset of k → -Space Instability on the λ Line
TL;DR: In this paper, the critical behavior of systems having a multicritical point of a new type, hereafter called a Lifshitz point, was calculated for anisotropic and isotropic systems.
Journal ArticleDOI
Theory of the Structural Phase Transformations in Tetrathiafulvalene-Tetracyanoquinodimethane (TTF-TCNQ)
Per Bak,V. J. Emery +1 more
TL;DR: In this paper, an order parameter theory is used to explain the observed structural phase transformations in tetrathiafulvalene tetracyanoquinodimethane (TNT) phase transformations.
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