Theory of triangular lattice quasi-one-dimensional charge-transfer solids
Theory of triangular lattice quasi-one-dimensional charge-transfer solids
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三角晶格准一维电荷转移固体理论
DOI:
10.1103/physrevb.100.115158
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发表时间:
2019
影响因子:
3.7
通讯作者:
Mazumdar, S.
中科院分区:
文献类型:
--
作者:
Clay, R. T.;Gomes, N.;Mazumdar, S.
Recent investigations of the magnetic properties and the discovery of superconductivity in quasi-one-dimensional triangular lattice organic charge-transfer solids have indicated the severe limitations of the effective-filled band Hubbard model for these and related systems. We present computational studies within the-filled band Hubbard model for these highly anisotropic systems. Individual organic monomer molecules, and not their dimers, constitute the sites of the Hamiltonian within our theory. We find enhancement of the long-range component of superconducting pairing correlations by the Hubbard repulsive interactionfor band parameters corresponding to, which is superconducting under moderate pressure. We find significantly weaker superconducting pairing at realistic values ofin, and we ascribe the experimentally observed transition to a spin-gapped insulator to the formation of a paired-electron crystal. We make the testable prediction that the spin gap will be accompanied by charge ordering and period doubling in two lattice directions. The weaker tendency to superconductivity incompared tois consistent with the more one-dimensional character of the former. Pressure-induced superconductivity is, however, conceivable. The overall results support a valence bond theory of superconductivity we have proposed recently.
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DOI:
--
发表时间:
2007
期刊:
影响因子:
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通讯作者:
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DOI:
--
发表时间:
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DOI:
10.1073/pnas.1614247113
发表时间:
2016-11-08
影响因子:
11.1
作者:
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通讯作者:
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