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Absence of superconductivity and valence bond order in the Hubbard–Heisenberg model for organic charge-transfer solids
2013
Journal of Physics: Condensed Matter
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A frustrated, effective 1/2-filled band Hubbard-Heisenberg model has been proposed to describe the strongly dimerized charge-transfer solid families kappa-(ET)_2X and Z[Pd(dmit)_2]_2. In addition to unconventional superconductivity these materials also exhibit antiferromagnetism, candidate spin-liquid phases, and in the case of Z=EtMe_3P, a so-called valence-bond solid phase. We show that neither superconductivity nor the valence-bond solid phase occurs within the Hubbard-Heisenberg model,
doi:10.1088/0953-8984/25/38/385603
pmid:23995074
fatcat:4tc7y5wc65bwjhi6vxhtyx4bxy