Resonating Valence Bond Theory of Coupled Heisenberg Chains

Heisenberg Antiferromagnet on Square-Kagomé Lattice: Resonating Valence Bond Description

Half-filled layered organic superconductors and the resonating-valence-bond theory of the hubbard-heisenberg model.

We present a resonating-valence-bond theory of superconductivity for the Hubbard-Heisenberg model on an anisotropic triangular lattice. Our calculations are consistent with the observed phase diagram of the half-filled layered organic superconductors, such as the beta, beta', kappa, and lambda phases of (BEDT-TTF)2X [bis(ethylenedithio)tetrathiafulvalene] and (BETS)2X [bis(ethylenedithio)tetras...

Dimer–resonating valence bond state of the four-leg Heisenberg ladder: Interference among resonances

Doped and undoped ladders have focused a lot of attention in recent years due to the existence of materials with that structure; some of them are close relatives of the high-Tc oxides as the series Sr2nl22Cu2nlO4nl22 where nl is the number of legs forming the ladder. The undoped Heisenberg spin ladders with nl even are known to be spin liquids with a spin gap and exponential decaying correlatio...

Resonating Valence Bond Mechanism of Impurity Band Superconductivity in Diamond

Superconductivity in an uncompensated boron doped diamond, a very recent observation, is strikingly close to an earlier observation of Anderson-Mott insulator to metal transition, prompting us to suggest an electron correlation driven superconductivity in an impurity band. Random coulomb potential remove a three fold orbital degeneracy of boron acceptor states, resulting in an effective single,...

Resonating valence bond liquid physics on the triangular lattice

We give an account of the short-range RVB liquid phase on the triangular lattice, starting from an elementary introduction to quantum dimer models including details of the overlap expansion used to generate them. The fate of the topological degeneracy of the state under duality is discussed, as well as recent developments including its possible relevance for quantum computing. §1. Short-range R...