Search

Your search keyword '"Canadell E"' showing total 40 results
Start Over Author "Canadell E" Publisher wiley-blackwell
40 results on '"Canadell E"'

38. New insights into the structural properties of κ-(BEDT-TTF) 2 Ag 2 (CN) 3 spin liquid.

Author

Foury-Leylekian P, Ilakovac V, Fertey P, Baledent V, Milat O, Miyagawa K, Kanoda K, Hiramatsu T, Yoshida Y, Saito G, Alemany P, Canadell E, Tomic S, and Pouget JP

Abstract

Here, the first accurate study is presented of the room-temperature and 100 K structures of one of the first organic spin liquids, κ-(BEDT-TTF) 2 Ag 2 (CN) 3 . It is shown that the monoclinic structure determined previously is only the average one. It is shown that the exact structure presents triclinic symmetry with two non-equivalent dimers in the unit cell. But surprisingly this does not lead to a sizeable charge disproportionation between dimers. The difference from the analogue compound κ-(BEDT-TTF) 2 Cu 2 (CN) 3 which also presents a spin liquid phase is discussed in detail. The data provided here show the importance of the anionic layer and in particular the transition metal position in the process of symmetry breaking. The possible impact of the symmetry breaking, albeit weak, on the spin-liquid mechanism and the influence of various disorders on the physical properties of this system is also discussed.

Published
2020
Full Text
View/download PDF

39. Crystal and electronic structure of a new metallic modification of (ET)2[KHg(SCN)4].

Author

Kazheva ON, Canadell E, Aleksandrov GG, Kushch ND, and Dyachenko OA

Abstract

A new room-temperature metallic modification of the well known radical cation salt (ET)(2)[KHg(SCN)(4)] has been prepared by electrochemical oxidation of ET. Its crystal and electronic structure have been examined at 110 K. The salt has a layered structure in which the conducting layers are characterized by the delta-type packing.

Published
2002
Full Text
View/download PDF

40. Quasi-three-dimensional network of molecular interactions and electronic structure of a new organic semiconductor, ET(NCS)0.77.

Author

Kazheva ON, Canadell E, Aleksandrov GG, Kushch ND, and Dyachenko OA

Abstract

The radical cation salt ET(NCS)0.77 [bis(ethylenedithio)tetrathiafulvalene thiocyanate (1/0.77)] has been prepared for the first time by electrocrystallization and its crystal and electronic structure at 110 K was investigated. The unit-cell dimensions are orthorhombic, a = 6.638 (1), b = 8.309 (2), c = 28.776 (6) A, V = 1587.1 (6) A3, space group Pbcm, Z = 4. The compound has a layered structure. The ET radical cations of the conducting cationic layer build stacks. In the anionic layer the thiocyanate groups form polymeric chains where they are oriented in a 'head-to-tail' mode. The structure has short intermolecular contacts of the cation-cation, anion-anion and cation-anion types, which leads to the formation of a three-dimensional structure of intermolecular interactions. This phenomenon is very rare in molecular conductors. Tight binding band structure calculations suggest, however, that the interlayer interactions through the anions are weak and that the incomplete occupation of the anion sites is the reason for the activated conductivity of the salt.

Published
2002
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results