%0 Journal Article
%T Field Dependence of π-Band Superconducting Gap in MgB2 Thin Films from Point-Contact Spectroscopy
%J 中国物理快报
%D 2008
%I 
%X We present the results of point-contact spectroscopy measurements on High-quality epitaxial MgB2 thin films with injected current along the c-axis. The temperature and field dependences of π-band properties with the field parallel to (H⊥) or perpendicular to (H|| the c-axis are investigated in detail. When a magnetic field is applied, either parallel or perpendicular to the c-axis, the density of the quasiparticle state (DOS) of the π-band proliferates quickly with increasing field, while the gap amplitude of the π-band decreases slowly, which is different from the recent theoretical calculations, showing a field dependent competition between the interband scattering and the pair-breaking effects.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=E62B7769E1A63AB113755BF61B5492A7&yid=67289AFF6305E306&vid=C5154311167311FE&iid=B31275AF3241DB2D&sid=28E08C23724B97C7&eid=531DED06424ADE72&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0