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Electrical Conductivity in Dynamically Orientationally Disordered Systems: AC and DC Measurements of Ferromagnetic Single Cristals TDAE-C60


Omerzu, Aleš; Mihailovič, Dragan; Tomić, Silvia; Milat, Ognjen; Biškup, Nevenko
Electrical Conductivity in Dynamically Orientationally Disordered Systems: AC and DC Measurements of Ferromagnetic Single Cristals TDAE-C60 // Physical Review Letters, 77 (1996), 10; 2045-2048 (međunarodna recenzija, članak, znanstveni)


Naslov
Electrical Conductivity in Dynamically Orientationally Disordered Systems: AC and DC Measurements of Ferromagnetic Single Cristals TDAE-C60

Autori
Omerzu, Aleš ; Mihailovič, Dragan ; Tomić, Silvia ; Milat, Ognjen ; Biškup, Nevenko

Izvornik
Physical Review Letters (0031-9007) 77 (1996), 10; 2045-2048

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

Ključne riječi
Fullerene; RbC60

Sažetak
In spite of a metallic C/sub 60/ molecular ground state, electrical conductivity measurements performed on single crystals of ferromagnetic TDAE-C/sub 60/ fail to show evidence of metallic behavior. Instead, the material appears to be an insultor exhibiting conductivity of the form sigma ( omega ,T)= sigma /sub DC/(T)+ sigma /sub AC/( omega ). Phonon-assisted activated polaronic hopping and interbuckyball tunneling, respectively, are proposed as the mechanisms for the two processes. The transition from a dynamically disordered state (rotating buckyballs) to a quasiordered state (frozen buckyballs) is clearly visible as a change in activation energy in the conductivity at T/sub 0/=150 K.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
00350103
00350105

Ustanove
Institut za fiziku, Zagreb

Časopis indeksira:


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