Non-Fermi liquid behavior due to U(1) gauge field in two dimensions

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• 作者：Jing-Rong Wang ; Guo-Zhu Liu
• 关键词： ; none ; color ; black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVC-4Y8G5V6-1&_mathId=mml13&_user=10&_cdi=5531&_pii=S0550321310000593&_rdoc=2&_issn=05503213&_acct=C000050221&_version=1&_userid=10&md5=eb3
• 刊名：Nuclear Physics B
• 出版年：2010
• 出版时间：21 June 2010
• 年：2010
• 卷：832
• 期：3
• 页码：441-461
• 全文大小：1042 K

文摘

We study the damping rate of massless Dirac fermions due to the U(1) gauge field in (2+1)-dimensional quantum electrodynamics. In the absence of a Maxwell term for the gauge field, the fermion damping rate is found to diverge in both perturbative and self-consistent results. In the presence of a Maxwell term, there is still divergence in the perturbative results for . Once the Maxwell term is included into the self-consistent equations for fermion self-energy and vacuum polarization functions, the fermion damping rate is free of divergence and exhibits non-Fermi liquid behavior: .