Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-09-06
Physics
Condensed Matter
Strongly Correlated Electrons
RevTeX4, 8 pages, 6 figures
Scientific paper
10.1103/PhysRevB.73.115102
We present the high-temperature (70 K < T < 300 K) resistivity anisotropy and Hall effect measurements of the quasi-one-dimensional (1D) organic conductor (TMTTF)2AsF6. The temperature variations of the resistivity are pronouncedly different for the three different directions, with metallic-like at high temperatures for the a-axis only. Above 220 K the Hall coefficient R_H is constant, positive and strongly enhanced over the expected value; and the corresponding carrier concentration is almost 100 times lower than calculated for one hole/unit cell. Our results give evidence for the existence of a high-temperature regime above 200 K where the 1D Luttinger liquid features appear in the transport properties. Our measurements also give strong evidence of charge ordering in (TMTTF)2AsF6. At the charge-ordering transition T_{CO} \approx 100 K, R_H(T) abruptly changes its behavior, switches sign and rapidly increases with further temperature decrease.
Basletic Mario
Dressel Martin
Hamzic Amir
Korin-Hamzic Bojana
Tafra Emil
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