Stability of the U(1) spin liquid with a spinon Fermi surface in2+1dimensions

2008/04/30 by Sung-Sik Lee
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.78.085129

published as Phys. Rev. B 78, 085129 (2008) · 14 pages, 7 figures, v3) minor corrections, to appear in PRB

arxiv created 2008/08/12 · openalex publication_date 2008/08/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

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.

Citations

• Stability ofU(1)spin liquids in two dimensions
• On the ground state properties of the anisotropic triangular antiferromagnet
• String-net condensation: A physical mechanism for topological phases
• Weak magnetism and non-Fermi liquids near heavy-fermion critical points
• Destruction of Néel order in the cuprates by electron doping