2009/03/31 by Hong Liu, John McGreevy, David Vegh · 1 citation
Physics and Astronomy · #hep-th #cond-mat.str-el
paper · pdf · doi:10.1103/physrevd.83.065029
published as Phys.Rev.D83:065029,2011 · 10 pages, 16 figures. v2: added references, corrected figures, some minor changes. v3: figure 5 replaced
arxiv created 2009/07/16 · arxiv updated 2011/05/10
We report on a potentially new class of non-Fermi liquids in (2+1)-dimensions. They are identified via the response functions of composite fermionic operators in a class of strongly interacting quantum field theories at finite density, computed using the AdS/CFT correspondence. We find strong evidence of Fermi surfaces: gapless fermionic excitations at discrete shells in momentum space. The spectral weight exhibits novel phenomena, including particle-hole asymmetry, discrete scale invariance, and scaling behavior consistent with that of a critical Fermi surface postulated by Senthil.