Susceptibility of a spinon Fermi surface coupled to a U(1) gauge field
Susceptibility of a spinon Fermi surface coupled to a U(1) gauge field
We study the theory of a U(1) gauge field coupled to a spinon Fermi surface. Recently this model has been proposed as a possible description of the organic compound $\ensuremath{\kappa}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}{\mathrm{Cu}}_{2}{(\mathrm{C}\mathrm{N})}_{3}$. We calculate the susceptibility of this system and in particular examine the effect of pairing of the underlying spin liquid. …