Stability of the U(1) spin liquid with a spinon Fermi surface in 2+1 dimensions

被引：80
|
作者：
Lee, Sung-Sik [1 ]
机构：
[1] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
来源：
PHYSICAL REVIEW B | 2008年 / 78卷 / 08期
基金：
加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1103/PhysRevB.78.085129
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the stability of the 2+1 dimensional U(1) spin liquid state against proliferation of instantons in the presence of a spinon Fermi surface. By mapping the spinon Fermi surface into an infinite set of 1+1 dimensional chiral fermions, it is argued that an instanton has an infinite scaling dimension for any nonzero number of spinon flavors. Therefore, the spin liquid phase is stable against instantons and the noncompact U(1) gauge theory is a good low-energy description.
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页数：13
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