The Editor's Roundtable: B-Type Natriuretic Peptide
- 作者：Vincent E. Friedewald Jr. ; John C. Burnett Jr. ; James L. Januzzi Jr. ; William C. Roberts ; Clyde W. Yancy
- 关键词：Hubbard model ; Ferromagnetism
- 刊名：The American Journal of Cardiology
- 出版年：2008
- 期刊代码：5_00029149
- 类别：med
- 出版时间：15 June 2008
- 卷：101
- 期：12
- 页码：1733-1740
- 文件大小：83 K
摘要
The survival of magnetic phases beyond the mean field level is a challenging issue in different models of strongly correlated electron systems. By applying the equation of motion method we develop an alternative version of the modified alloy analogy to account for the ferromagnetic phase of the Hubbard model. The method incorporates the quasiparticle damping and a spin-dependent band shift which strongly affects the distribution of spectral weight in the densities of states. The selfconsistent spontaneous magnetization and the nearest-neighbor correlation functions l5">le="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJJ-4S0JN4X-3&_mathId=mml5&_user=1067359&_cdi=5312&_rdoc=129&_acct=C000050221&_version=1&_userid=10&md5=794cb190234c72f05c6dc87519ddb636" title="Click to view the MathML source" alt="Click to view the MathML source">
lt="left angle bracket" title="left angle bracket" border="0">niσnkσ′
lt="right-pointing angle bracket" title="right-pointing angle bracket" border="0"> are calculated as a function of temperature for finite U and for different band fillings.
lt="left angle bracket" title="left angle bracket" border="0">niσnkσ′lt="right-pointing angle bracket" title="right-pointing angle bracket" border="0"> are calculated as a function of temperature for finite U and for different band fillings.