File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: a.c. conductance study of polycrystal C60

Titlea.c. conductance study of polycrystal C<inf>60</inf>
Authors
Issue Date1995
Citation
Physics Letters A, 1995, v. 201, n. 5-6, p. 443-446 How to Cite?
AbstractThe a.c. (1 < f < 50 kHz) conductance of a C 60 polycrystal (grain size 30 nm) has been studied from 100 to 350 K. Below 150 K, the a.c. conductance is nearly proportional to the temperature and frequency. This is proposed to be due to the hopping of localized states around the Fermi level. Above 200 K, the a.c. conductance exhibits a rapid increase with temperature, and shows a thermally activated behaviour with an activation energy of 0.389 eV below a certain temperature and 0.104 eV above it. A frequency dependent conductance at a fixed temperature is also obtained with a power law σ ∼ ω s (s ≈ 0.8). For a sample of normal grain size, we have measured a peak near 250 K and a much smaller conductance. These results indicate that the defective nature of our sample (small grain size, disorder or impurities) plays an important role for the transport properties. The existence of nanocrystals in the sample may give rise to localized states and improve its a.c. conductance. The two activation energies can be attributed to the coexistence of the crystalline and amorphous phases of C 60 . © 1995.
Persistent Identifierhttp://hdl.handle.net/10722/254495
ISSN
2015 Impact Factor: 1.677
2015 SCImago Journal Rankings: 0.755

 

DC FieldValueLanguage
dc.contributor.authorYan, Feng-
dc.contributor.authorWang, Ye Ning-
dc.contributor.authorHuang, Yi Neng-
dc.contributor.authorGu, Min-
dc.contributor.authorZhang, Qing Ming-
dc.contributor.authorShen, Hui Min-
dc.date.accessioned2018-06-19T15:40:42Z-
dc.date.available2018-06-19T15:40:42Z-
dc.date.issued1995-
dc.identifier.citationPhysics Letters A, 1995, v. 201, n. 5-6, p. 443-446-
dc.identifier.issn0375-9601-
dc.identifier.urihttp://hdl.handle.net/10722/254495-
dc.description.abstractThe a.c. (1 < f < 50 kHz) conductance of a C 60 polycrystal (grain size 30 nm) has been studied from 100 to 350 K. Below 150 K, the a.c. conductance is nearly proportional to the temperature and frequency. This is proposed to be due to the hopping of localized states around the Fermi level. Above 200 K, the a.c. conductance exhibits a rapid increase with temperature, and shows a thermally activated behaviour with an activation energy of 0.389 eV below a certain temperature and 0.104 eV above it. A frequency dependent conductance at a fixed temperature is also obtained with a power law σ ∼ ω s (s ≈ 0.8). For a sample of normal grain size, we have measured a peak near 250 K and a much smaller conductance. These results indicate that the defective nature of our sample (small grain size, disorder or impurities) plays an important role for the transport properties. The existence of nanocrystals in the sample may give rise to localized states and improve its a.c. conductance. The two activation energies can be attributed to the coexistence of the crystalline and amorphous phases of C 60 . © 1995.-
dc.languageeng-
dc.relation.ispartofPhysics Letters A-
dc.titlea.c. conductance study of polycrystal C<inf>60</inf>-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/0375-9601(95)00260-A-
dc.identifier.scopuseid_2-s2.0-0001498361-
dc.identifier.volume201-
dc.identifier.issue5-6-
dc.identifier.spage443-
dc.identifier.epage446-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats