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Low-frequency dielectric response of charge-density wave pinned by commensurability in (2, 5(OCH_3)DCNQI)_2Li


Tomić, Silvia; Biškup, Nevenko; Pinterić, Marko; Von Schutz, J.U.; Schmitt, H.; Moret, R.
Low-frequency dielectric response of charge-density wave pinned by commensurability in (2, 5(OCH_3)DCNQI)_2Li // Europhysics Letters, 38 (1997), 3; 219-224 (međunarodna recenzija, članak, znanstveni)


Naslov
Low-frequency dielectric response of charge-density wave pinned by commensurability in (2, 5(OCH_3)DCNQI)_2Li

Autori
Tomić, Silvia ; Biškup, Nevenko ; Pinterić, Marko ; Von Schutz, J.U. ; Schmitt, H. ; Moret, R.

Izvornik
Europhysics Letters (0295-5075) 38 (1997), 3; 219-224

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Charge-density wave systems; collective modes

Sažetak
We have used complex conductivity measurements between 20 Hz and 1 MHz to probe the dielectric response in the low-temperature phase of the (2, 5(OCH_3)DCNQI)_2Li organic conductor. The observed data reveal the existence of the relaxation process which is well described by a Debye-like expression for an overdamped response of a system with a single degree of freedom. Both the static dielectric constant (epsilon_o = 3 imes 10^7) and the characteristic relaxation time ( au_o) are much larger than that expected for single particle excitations. au_o is thermally activated in a manner similar to the dc conductivity. We attribute the observed relaxation to N=4 charge density wave pinned by commensurability to the underlying lattice.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
00350103

Ustanove
Institut za fiziku, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus