Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wu, Ya-Nan | en_US |
dc.contributor.author | Wei, Yan-Fang | en_US |
dc.contributor.author | Li, Zhi-Qing | en_US |
dc.contributor.author | Lin, Juhn-Jong | en_US |
dc.date.accessioned | 2019-04-03T06:41:25Z | - |
dc.date.available | 2019-04-03T06:41:25Z | - |
dc.date.issued | 2015-03-03 | en_US |
dc.identifier.issn | 1098-0121 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevB.91.104201 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/124523 | - |
dc.description.abstract | We study the temperature behaviors of the Hall coefficient, R-H, and longitudinal conductivity, sigma, of two series of Ag-x(SnO2)(1-x) (x being the Ag volume fraction) granular films lying in the metallic regime. The first (second) series of films are similar to 500 (similar to 9) nm thick and constitute a three-(two-) dimensional granular array. In the high-x regime with g(T) >> g(T)(c) (g(T) being the dimensionless intergrain tunneling conductance, and g(T)(c) being the critical tunneling conductance at the percolation threshold), we observe a R-H alpha ln T law from similar to 6 to 300K. This ln T behavior is independent of array dimensionality. We also observe a sigma alpha ln T law in the temperature range similar to 20-100 K. Below similar to 10 K, the temperature behavior of sigma changes to a root T dependence in thick films, while it changes to a different ln T dependence in thin films. The overall R-H and sigma characteristics can be explained by the electron-electron interaction (EEI) effects in the presence of granularity. As x is reduced and approaches the percolation threshold, we found that the ln T dependences of R-H and sigma still hold for a wide temperature range. We propose an explanation for the long-standing puzzle of the sigma alpha ln T dependence, which has previously been frequently observed in composite systems near the quantum percolation threshold, as arising from the same EEI effect considered in the recent theory of granular metals. | en_US |
dc.language.iso | en_US | en_US |
dc.title | Electron-electron interaction effect on longitudinal and Hall transport in thin and thick Ag-x(SnO2)(1-x) granular metals | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1103/PhysRevB.91.104201 | en_US |
dc.identifier.journal | PHYSICAL REVIEW B | en_US |
dc.citation.volume | 91 | en_US |
dc.citation.issue | 10 | en_US |
dc.citation.spage | 0 | en_US |
dc.citation.epage | 0 | en_US |
dc.contributor.department | 電子物理學系 | zh_TW |
dc.contributor.department | 物理研究所 | zh_TW |
dc.contributor.department | Department of Electrophysics | en_US |
dc.contributor.department | Institute of Physics | en_US |
dc.identifier.wosnumber | WOS:000350498600003 | en_US |
dc.citation.woscount | 4 | en_US |
Appears in Collections: | Articles |
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