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Sumitendra Mazumdar and Rudolf Torsten Clay The chemical physics of unconventional superconductivity International Journal of Quantum Chemistry 114

Article first published online: 20 FEB 2014 | DOI: 10.1002/qua.24637

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There exist an unusually large number of correlated-electron superconductors with carrier concentration per site of inline image. Precisely at this carrier concentration there is a strong tendency to form local spin-singlets, as shown in the accompanying figure: the dimerized lattice with inline image an electron per site is antiferromagnetic at small lattice frustration but spin-singlet with charge ordering at larger frustration. We propose that superconductivity is due to condensation of mobile spin-singlets at larger frustration.

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