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Small polarons as charge carriers in the transport of (La1/3Sm2/3)(0.67)Ba0.33-xSrxMnO3 (x=0, 0.1, 0.2 and 0.33)

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Title Small polarons as charge carriers in the transport of (La1/3Sm2/3)(0.67)Ba0.33-xSrxMnO3 (x=0, 0.1, 0.2 and 0.33)
 
Creator ASTHANA, S
BAHADUR, D
SRIVASTAVA, CM
 
Subject manganites
manganites
small polaron
transport mechanism
ir spectra
displaced phonons
 
Description It is shown that charge transport in substituted manganites (La1/3S2/3)(0.67)Ba0.33-xSrxMnO3 (x = 0.0: 0.1: 0.2 and 0.33) is through polarons which are formed through electron-phonon interaction whose strength determines the mobility of the charge carrier. For weak coupling, the free phonon mode is only slightly affected but in strong coupling, the free phonon mode disappears and 'displaced' phonon modes appear. This is seen directly in IR spectra. (c) 2005
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-26T17:26:37Z
2011-12-26T12:55:24Z
2011-12-27T05:39:37Z
2011-07-26T17:26:37Z
2011-12-26T12:55:24Z
2011-12-27T05:39:37Z
2006
 
Type Article
 
Identifier PHYSICA B-CONDENSED MATTER, 371(2), 241-244
0921-4526
http://dx.doi.org/10.1016/j.physb.2005.10.113
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6977
http://hdl.handle.net/10054/6977
 
Language en