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Anisotropy and field-dependence of the spin-density wave dynamics in the quasi one-dimensional conductor TMTSF2PF6 (CROSBI ID 116733)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Zornoza, P ; Petukhov, Kostja ; Dressel, Martin ; Vuletić, Tomislav ; Biškup, Nevenko ; Tomić, Silvia Anisotropy and field-dependence of the spin-density wave dynamics in the quasi one-dimensional conductor TMTSF2PF6 // European physical journal B : condensed matter physics, 46 (2005), 223-230-x

Podaci o odgovornosti

Zornoza, P ; Petukhov, Kostja ; Dressel, Martin ; Vuletić, Tomislav ; Biškup, Nevenko ; Tomić, Silvia

engleski

Anisotropy and field-dependence of the spin-density wave dynamics in the quasi one-dimensional conductor TMTSF2PF6

The anisotropic and non-linear transport properties of the quasi one-dimensional organic conductor (TMTSF)2PF6 have been studied by dc, radiofrequency, and microwave methods. Microwave experiments along all three axes reveal that collective transport, which is considered to be the .ngerprint of the spin-density-wave condensate, also occurs in the perpendicular b_ direction. The pinned mode resonance is present in the a and b_-axes response, but not along the least conducting c. direction. The ac-field threshold, above which the spin-density-wave response is non-linear, strongly decreases as the temperature drops below 4 K. With increasing strength of the microwave electric field and of the radiofrequency signal, the pinned mode and the screened phason loss-peak shift to lower frequencies. In the non-linear regime, in addition to the phason relaxation mode with Arrhenius-like resistive decay, an additional mode with very long and temperature-independent relaxation time appears below 4 K. We attribute the new process to short-wavelength excitations associated with discommensurations of the spin density wave close to commensurability.

anisotropic and non-linear transport; spin-density wave; pinned mode; complex phason relaxation

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Podaci o izdanju

46

2005.

223-230-x

objavljeno

1434-6028

Povezanost rada

Fizika

Indeksiranost