Optical anisotropy of YBa2Cu3O7-δ films on NdGaO3(001) substrates : a comparison with single domain crystals

We have investigated the spectral reflectance of thin YBa2Cu3O7−δ films deposited on twin-free NdGaO3(001) substrates. Using polarized light in the spectral range between 50 meV and 6 eV, we found a significant a-b anisotropy near the plasma edge. On the basis of a Lorentz–Drude model we have calcul...

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Veröffentlicht in:	Applied physics letters 1992-07, Vol.61 (3), p.345-347
Hauptverfasser:	ZIBOLD, A, WIDDER, K, GESERICH, H. P, SCHERER, T, MARIENHOFF, P, NEUHAUS, M, JUTZI, W, ERB, A, MÜLLER-VOGT, G
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Dielectric thin films Dielectrics, piezoelectrics, and ferroelectrics and their properties Exact sciences and technology Physics
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Zusammenfassung:	We have investigated the spectral reflectance of thin YBa2Cu3O7−δ films deposited on twin-free NdGaO3(001) substrates. Using polarized light in the spectral range between 50 meV and 6 eV, we found a significant a-b anisotropy near the plasma edge. On the basis of a Lorentz–Drude model we have calculated the tensor components of the dielectric function parallel to the a and to the b axis, respectively. The obtained results are compared with the a-b anisotropy of single domain crystals.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.107932