Boris, A. V. and Kovaleva, N. N. and Bazhenov, A. V. and van Bentum, P. J. M. and Rasing , Th. and Cheong, S-W. and Samoilov, A. V. and Yeh, N.-C. (1999) Infrared studies of a La_(0.67)Ca_(0.33)MnO_3 single crystal: Optical magnetoconductivity in a half-metallic ferromagnet. Physical Review B, 59 (2). R697-R700 . ISSN 0163-1829 http://resolver.caltech.edu/CaltechAUTHORS:20111213-141105315
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The infrared reflectivity of a La_(0.67)Ca_(0.33)MnO_3 single crystal is studied over a broad range of temperatures (78–340 K), magnetic fields (0–16 T), and wave numbers (20–9000cm^(-1)). The optical conductivity gradually changes from a Drude-like behavior to a broad peak feature near 5000cm-1 in the ferromagnetic state below the Curie temperature T_C=307K. Various features of the optical conductivity bear striking resemblance to recent theoretical predictions based on the interplay between the double exchange interaction and the Jahn-Teller electron-phonon coupling. A large optical magnetoconductivity is observed near T_C.
|Additional Information:||© 1999 The American Physical Society. Received 30 September 1998. This research at the Institute of Solid State Physics is supported by Russian State Program under Grant No. 96031. Part of the work done at Caltech is supported by NASA/OSS and the Packard Foundation.|
|Classification Code:||PACS: 75.30.-m, 71.38.+i, 72.80.Ga, 78.30.-j|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||14 Dec 2011 16:22|
|Last Modified:||26 Dec 2012 14:36|
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