Measurement of c-axis optical absorptivity of La{sub 1.87}Sr{sub 0.13}CuO{sub 4}
- Univ. of California, Berkeley, CA (United States). Dept. of Physics
- Max-Planck-Inst. fuer Festkorperfoerschung, Stuttgart (Germany)
- Univ. of Nijmegen (Netherlands). High Field Magnet Lab.
- Univ. of Amsterdam (Netherlands). Dept. of Physics
The authors have directly measured the c-axis optical absorptivity of a large single crystal of La{sub 1.87}Sr{sub 0.13}CuO{sub 4} between 9 and 80 cm{sup {minus}1} at 2 K using Fourier transform spectroscopy and an absorbed power technique. They see an absorptivity onset at 41 cm{sup {minus}1}, which is 2--3 cm{sup {minus}1} higher than that measured at 6 K with reflectance on the same sample, suggesting that a significant fraction of the electrons remain unpaired at 6 K. The absorption increases with frequency below the onset, increasing from 0.3% at 9 cm{sup {minus}1} to 8% at 40 cm{sup {minus}1}. The data are particularly significant at frequencies below the plasma edge, for which the reflectance is close to unity.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 538189
- Report Number(s):
- CONF-960163--; ISBN 0-8194-2070-0
- Country of Publication:
- United States
- Language:
- English
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