Superconductivity in the liquid-dimer valence-bond state
L. B. Ioffe, A. I. Larkin
DOI 10.1103/PhysRevB.40.6941 · Physical Review B
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Abstract
Introducing an unambiguous prescription which converts singlet dimers into quasidipoles, we describe the low-energy excitations in the liquid-dimer state as fluctuations of the average dipole moment. The exchange of these fluctuations leads to a long-range interaction between holes in this state. This interaction favors the two-particle Bose condensate and destroys the order parameter of the one-particle Bose condensate even at zero temperature.
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