%0 Journal Article
%T SUPERCONDUCTING A AND B PHASES IN TRIPLET BIPOLARON SYSTEMS<br>三重态双极化子的超导A相与B相
%A LI YAN-MIN
%A ZHANG LI-YUAN
%A <br>厉彦民
%A 章立源
%J 物理学报
%D 1986
%I 
%X Superconducting A and B phases in triplet bipolaron system have been treated by useing the selfconsistent broken-symmetry Hartree approximation. The B phase is always more stable than the A phase in the weak coupling case. But in the strong coupling case, owing to the fluctuation feedback effect, the free energy of the A phase can be lower than that of the B phase, or the A-B transition may occur, which is analogous to the superfluid of 3He. The thermody-namic critical field Hc of the stable phase of the system has also been calculated and compared with the upper critical fields of heavy-fermion superconductors, UBe13, UPt3 and URi2Si2. It has been found that Hc can qualitatively account for the abnormal temperature dependences of the upper critical fields of these superconductors.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=9E4D5ACCE67A46EC16C30D1689319F82&yid=4E65715CCF57055A&vid=6209D9E8050195F5&iid=59906B3B2830C2C5&sid=9C467F963DDC525B&eid=393FA6E3D9B6498B&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0