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|Title: ||Localization and Hopping Conduction in the Sn-doped (Bi, Pb)2Sr Ca2Cu20y System|
|Authors: ||Nkum, Robert Kwame|
|Issue Date: ||7-Sep-2011|
|Abstract: ||The effect of Sn substitution for Cu on the. properties of the Bi1.7 Pbo.3Sr2Ca2-
Cu3.6.s-xSnxOy system has been investigated. The concentration of free charge carri-
ers decreases with Sn-doping which results in a suppression of the transition temper-
ature. Disorder in the system increases with Sn concentration. Conduction merit-
anism in the scmie. nducting samples of the systems governed by phonon-assisted
veriable range hopping, the dimensionality of which changes from two to three as the normal-state resistivity increases away from the superconductor-insulator boundary.
Heppitig-conduction in these materials indicates that the substitution of Sn results the localization of charge carriers in the system.|
|Description: ||Nkum's article|
|Appears in Collections:||College of Science|
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