Electrical conductivity in dynamically orientationally disordered systems: ac and dc measurements in ferromagnetic single crystals of TDAE-C-60 (CROSBI ID 77175)
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Podaci o odgovornosti
Omerzu, Aleš ; Mihailovič, Dragan ; Tomić, Silvia ; Milat, Ognjen ; Biškup, Nevenko
engleski
Electrical conductivity in dynamically orientationally disordered systems: ac and dc measurements in ferromagnetic single crystals of TDAE-C-60
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.
fullerene ; RbC60
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o izdanju
77 (10)
1996.
2045-2048
objavljeno
0031-9007
1079-7114
10.1103/PhysRevLett.77.2045