MATERIALS SCIENCE & ENGINEERING g Unexpected behaviour of IR reflectivity of a YBa2Cu307 6 oriented film

Ricardo Lobo (1) , François Gervais (2) , Corinne Champeaux (3) , Pascal Marchet (4) , Alain Catherinot (3)

1 LPEM - Laboratoire de Physique et d'Etude des Matériaux (UMR 8213)
2 LEMA - Laboratoire d'Electrodynamique des Matériaux Avancés
3 Axe 2 : procédés de traitements de surface
4 SPCTS-AXE3 - Axe 3 : organisation structurale multiéchelle des matériaux

a-b plant oriented YBa2Cu307 ,7 films have been obtained by laser ablation. Electrical and structural characterization is presented as well as temperature dependent (4 K up to room temperature) optical reflectance spectra recorded between 50 cm-1 and 22 000 cm-1. Extra absorptions at low frequencies and low temperatures are analysed and their connection with a possible superconducting gap is discussed. It is emphasized that the overall conducting behaviour in the normal state is well described by a single Drude-like modified term.

Mots clés: YBCO thin films; Superconducting gap; Optical conductivity

Domaines: Chimie; Matériaux

Ricardo Lobo, François Gervais, Corinne Champeaux, Pascal Marchet, Alain Catherinot. MATERIALS SCIENCE & ENGINEERING g Unexpected behaviour of IR reflectivity of a YBa2Cu307 6 oriented film. Materials Science and Engineering: B, 1995, 34 (1), pp.74-79. ⟨10.1016/0921-5107(95)01239-7⟩. ⟨hal-02296057⟩