Insulating states from increased kinetic energy: counterintuitive physics in the basic model of organic conductors and superconductors
ORAL
Abstract
The U-V model at quarter filling is the canonical model of the organic Bechgaard and Fabre salts, the first materials to exhibit a superconducting phase based on repulsive electron interactions, which is accompanied by competing magnetic phases just as for the cuprates of high-Tc superconductivity. However, just as for the doped 2D Hubbard model, the
U-V model can exhibit very rich and complicated physics, which are a challenge to treat reliably. In the presented work, we show that the U-V model can give rise to surprising physics in which an insulating state emerges from increased transverse kinetic energy, by combining large-scale DMRG results with analytic RG of bosonized models of the 2-leg U-V Hubbard ladder.
U-V model can exhibit very rich and complicated physics, which are a challenge to treat reliably. In the presented work, we show that the U-V model can give rise to surprising physics in which an insulating state emerges from increased transverse kinetic energy, by combining large-scale DMRG results with analytic RG of bosonized models of the 2-leg U-V Hubbard ladder.
*This work was supported in part by the Swiss NSF under MaNEP and Division II, as well as through support by the Swiss government for the MAQUIS collaboration under the HP2C Initiative.
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Presenters
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Adrian Kantian
- Uppsala University