Premium
Induction of high‐temperature superconductivity in pulsed laser ablated La 2 CuO 4 thin films by room temperature chemical oxidation
Author(s) -
Lees Simon T.,
Edwards Peter P.,
Gameson Ian,
Jones Martin O.,
Slaski Marcin,
Rial Carmen,
Amador Ulises,
Morán Emilio
Publication year - 1997
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19970091013
Subject(s) - materials science , thin film , stoichiometry , superconductivity , laser ablation , pulsed laser deposition , antiferromagnetism , fabrication , high temperature superconductivity , analytical chemistry (journal) , laser , nanotechnology , condensed matter physics , chemistry , optics , medicine , physics , alternative medicine , pathology , chromatography
Facile fabrication of high‐temperature superconducting La 2 CuO 4 thin films through the combination of two seemingly disparate techniques is reported. Pulsed laser ablation is used to produce stoichiometric, c ‐axis oriented La 2 CuO 4 thin films −3700 Å in thickness. The convenient method of controlled room‐temperature chemical oxidation using aqueous sodium bromite is then utilized to introduce excess holes in the valance band of La 2 CuO 4 . This induces superconductivity in the otherwise antiferromagnetic semiconductor.