Bosonic Resonating-Valence-Bond Description of a Doped Antiferromagnet
نویسندگان
چکیده
We propose a theory for a doped antiferromagnet based on the bosonic resonating-valence-bond (RVB) description incorporating the phase string effect. Both antiferromagnetic and superconducting phase transitions occur naturally inside such a bosonic RVB phase. Two distinct metallic regions— underdoping and optimum doping—are also found to be a logical consequence; their unique features explain the recent neutron-scattering measurements in cuprates. [S0031-9007(98)06293-0]
منابع مشابه
Bosonic versus fermionic pairs of topological spin defects in monolayered high-Tc superconductors
The energy associated with bosonic and fermionic pairs of topological spin defects in doped antiferromagnetic quantum spin-1 /2 square lattice is estimated within a resonating valence bond scenario, as described by a t-t -J-like model Hamiltonian, plus a t , responsible of a three-dimensional screening of the electrostatic repulsion within the bosonic pairs. For parameters appropriate for monol...
متن کاملScale-free antiferromagnetic fluctuations in the s = 1/2 kagome antiferromagnet herbertsmithite.
Neutron spectroscopy and diffuse neutron scattering on herbertsmithite [ZnCu(3)(OH)(6)Cl(2)], a near-ideal realization of the s=1/2 kagome antiferromagnet, reveal the hallmark property of a quantum spin liquid: instantaneous short-ranged antiferromagnetic correlations in the absence of a time-averaged ordered moment. These dynamic antiferromagnetic correlations are weakly dependent of neutron-e...
متن کاملFrustrated resonating valence bond states in two dimensions: classification and short-range correlations.
Resonating valence bond (RVB) states are of crucial importance in our intuitive understanding of quantum spin liquids in 2D. We systematically classify short-range bosonic RVB states into symmetric or nematic spin liquids by examining their flux patterns. We further map short-range bosonic RVB states into projected BCS wave functions, on which we perform large-scale Monte Carlo simulations with...
متن کاملCharge-ordered resonating valence bond states in doped cuprates
We study charge ordered d-wave resonating valence bond states sdRVBd in the doped cuprates, and estimate the energies of these states in a generalized t-J model by using a renormalized mean-field theory. The longrange Coulomb potential tends to modulate the charge density in favor of the charge ordered RVB state. The possible relevance to the recently observed 434 checkerboard patterns in tunne...
متن کامل