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Infrared and Raman Spectroscopy of Phonons in n-Type High Tc Superconductors

Published online by Cambridge University Press:  28 February 2011

M. K. Crawford ,
G. Burns ,
G. V. Chandrashekhar ,
F. H. Dacol ,
W. E. Farneth ,
E. M. Mc Carrón, III  and
R. J. Smalley
M. K. Crawford
Affiliation:
E. I. du Pont de Nemours & Co., Inc., CR&D Department, Experimental Station, Wilmington, DE 19880-0356
G. Burns
Affiliation:
BM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598–0218, China
G. V. Chandrashekhar
Affiliation:
BM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598–0218, China
F. H. Dacol
Affiliation:
BM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598–0218, China
W. E. Farneth
Affiliation:
E. I. du Pont de Nemours & Co., Inc., CR&D Department, Experimental Station, Wilmington, DE 19880-0356
E. M. Mc Carrón, III
Affiliation:
E. I. du Pont de Nemours & Co., Inc., CR&D Department, Experimental Station, Wilmington, DE 19880-0356
R. J. Smalley
Affiliation:
E. I. du Pont de Nemours & Co., Inc., CR&D Department, Experimental Station, Wilmington, DE 19880-0356
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Abstract

We have measured the infrared (IR) reflectance and Raman spectra of electron doped and undoped Nd2CuO4 and Pr2CuO4. Utilizing the results from doped ceramics and undoped ab plane oriented single crystals, we observe and assign all the IR active phonons (3A2u + 4Eu) predicted by group theory. We have also observed the Raman active modes involving atom motion along the c axis. We compare our results to those found in the related hole superconductors based upon La2CuO4.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1013
Copyright
Copyright © Materials Research Society 1990

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References

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