TY - JOUR
T1 - Absence of superconductivity and valence bond order in the Hubbard-Heisenberg model for organic charge-transfer solids
AU - Gomes, N.
AU - Clay, R. T.
AU - Mazumdar, S.
PY - 2013/9/25
Y1 - 2013/9/25
N2 - A frustrated, effective 1/2-filled band Hubbard-Heisenberg model has been proposed for describing the strongly dimerized charge-transfer solid families κ-(ET)2X and Z[Pd(dmit)2]2. In addition to showing unconventional superconductivity, these materials also exhibit antiferromagnetism, candidate spin-liquid phases, and, in the case of Z = EtMe3P, a spin-gapped phase that has sometimes been referred to as a valence bond solid. We show that neither superconductivity nor the valence bond order phase occurs within the Hubbard-Heisenberg model. We suggest that a description based on 1 4 -filling, that is reached when the carrier concentration per molecule instead of per dimer is considered, thus may be appropriate.
AB - A frustrated, effective 1/2-filled band Hubbard-Heisenberg model has been proposed for describing the strongly dimerized charge-transfer solid families κ-(ET)2X and Z[Pd(dmit)2]2. In addition to showing unconventional superconductivity, these materials also exhibit antiferromagnetism, candidate spin-liquid phases, and, in the case of Z = EtMe3P, a spin-gapped phase that has sometimes been referred to as a valence bond solid. We show that neither superconductivity nor the valence bond order phase occurs within the Hubbard-Heisenberg model. We suggest that a description based on 1 4 -filling, that is reached when the carrier concentration per molecule instead of per dimer is considered, thus may be appropriate.
UR - https://www.scopus.com/pages/publications/84883575312
UR - https://www.scopus.com/pages/publications/84883575312#tab=citedBy
U2 - 10.1088/0953-8984/25/38/385603
DO - 10.1088/0953-8984/25/38/385603
M3 - Article
C2 - 23995074
AN - SCOPUS:84883575312
SN - 0953-8984
VL - 25
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 38
M1 - 385603
ER -