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Proceedings Paper

Optical studies of magnons, excitons, and polarons in CuO2-layer compounds
Author(s): Marc A. Kastner; Robert J. Birgeneau
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Paper Abstract

The optical properties of undoped and lightly doped lamellar copper oxides are reviewed. In the undoped materials the absorption below the charge-transfer gap is dominated by magnetic and crystal field excitations of the CuO2 layers. The temperature dependence of the charge-transfer absorption provides evidence that free charged excitations form large polarons. However, the optical ionization energy of holes bound to acceptors is much larger than the thermal ionization energy, indicating that the bound polarons are small. The parameters extracted from optical measurements predict the Hall mobility of holes in lightly doped La2CuO4, with no adjustable parameters, confirming that the carriers are polarons.

Paper Details

Date Published: 10 June 1996
PDF: 11 pages
Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); doi: 10.1117/12.241763
Show Author Affiliations
Marc A. Kastner, Massachusetts Institute of Technology (United States)
Robert J. Birgeneau, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 2696:
Spectroscopic Studies of Superconductors
Ivan Bozovic; Dirk van der Marel, Editor(s)

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