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Low- temperature thermodynamic investigation of the sulphur organic salts (TMTTF)2PF6 and (TMTTF)2Br: general aspects (I part) (CROSBI ID 131529)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Lasjaunias, J. C. ; Brison, J. P. ; Monceau, P. ; Starešinić, Damir ; Biljaković, Katica ; Carcel, C. ; Fabre, J. M. Low- temperature thermodynamic investigation of the sulphur organic salts (TMTTF)2PF6 and (TMTTF)2Br: general aspects (I part) // Journal of physics. Condensed matter, 14 (2002), 837-947-x

Podaci o odgovornosti

Lasjaunias, J. C. ; Brison, J. P. ; Monceau, P. ; Starešinić, Damir ; Biljaković, Katica ; Carcel, C. ; Fabre, J. M.

engleski

Low- temperature thermodynamic investigation of the sulphur organic salts (TMTTF)2PF6 and (TMTTF)2Br: general aspects (I part)

A detailed thermodynamical investigation of the quasi-one-dimensional sulphur-based organic salts (TMTTF)(2)PF6 and (TMTTF)(2)Br is presented in the temperature range from 30 mK to 7 K. In this part (part I), we consider the general aspects of the low-temperature specific heat of these materials in relationship with their ground states and we compare them with those previously measured for selenium members of the same family. All these compounds exhibit very similar thermodynamical behaviour, despite a variety of electronic ground states: spin-Peierls for (TMTTF)(2)PF6, commensurate antiferromagnetic spin modulation for (TMTTF)(2)Br, incommensurate spin-density wave for (TMTSF)(2)PF6 (TMTSF drop tetramethyltetraselenafulvalene). We show that the low-energy excitations which are predominant below 1 K have a similar character to that observed in glassy systems, at least on short timescales of measurements. The dynamical aspects of the non-equilibrium thermodynamics will be presented separately in the following part (part H).

Spin-density-wave. Peierls compound cugeo3. Glass-transition. Phase. Heat. Charge. (tmtsf)(2)pf6. (tmtsf)2pf6. Impurities.

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Podaci o izdanju

14

2002.

837-947-x

objavljeno

0953-8984

Povezanost rada

Fizika