Amperean pairing instability in the U1 spin liquid state with fermi surface and application to kappa-(BEDT-TTF)2Cu2(CN)3.

  title={Amperean pairing instability in the U1 spin liquid state with fermi surface and application to kappa-(BEDT-TTF)2Cu2(CN)3.},
  author={Sung-Sik Lee and Patrick A. Lee and Todadri Senthil},
  journal={Physical review letters},
  volume={98 6},
Recent experiments on the organic compound kappa-(BEDT-TTF)2Cu2(CN)3 raise the possibility that the system may be described as a quantum spin liquid. Here we propose a pairing state caused by the "Amperean" attractive interaction between spinons on a Fermi surface mediated by the U(1) gauge field. We show that this state can explain many of the observed low temperature phenomena and discuss testable consequences. 
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Probing the Mott physics in κ-(BEDT-TTF)₂X salts via thermal expansion.
  • M. de Souza, L. Bartosch
  • Physics, Materials Science
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2015
A synopsis of literature results with focus on recent expansivity measurements probing the Mott MI transition in molecular conductors of the κ-(BEDT-TTF)2X type) type is presented.
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Experimental data suggest that EtMe3Sb[Pd(dmit)2]2, an organic system with a two-dimensional triangular lattice, undergoes a low-temperature phase transition that is not accompanied by classical