Spin-charge separation: From one hole to finite doping
نویسندگان
چکیده
منابع مشابه
Quantum dynamics of charged and neutral magnetic solitons: Spin-charge separation in the one-dimensional Hubbard model
We demonstrate that the configuration interaction ~CI! approximation recaptures essential features of the exact ~Bethe-ansatz! solution to the one-dimensional ~1D! Hubbard model. As such, it provides a valuable route for describing effects that go beyond mean-field theory for strongly correlated electron systems in higher dimensions. The CI method systematically describes fluctuation and quantu...
متن کاملNature of spin-charge separation in the t-J model
Quasiparticle properties are explored in an effective theory of the t-J model which includes two important components: spin-charge separation and unrenormalizable phase shift. We show that the phase shift effect indeed causes the system to be a non-Fermi liquid as conjectured by Anderson on general grounds. But this phase shift also drastically changes a conventional perception of quasiparticle...
متن کاملA microscopic model for D-wave pairing in the cuprates: what happens when electrons somersault?
We present a microscopic model for a strongly repulsive electron gas on a 2D square lattice. We suggest that nearest-neighbor Coulomb repulsion stabilizes a state in which electrons undergo a `somersaulta in their internal spin-space (spin-#ux). When this spinantiferromagnetic (AFM) insulator is doped, the charge carriers nucleate mobile, charged, bosonic vortex solitons accompanied by unoccupi...
متن کاملInvestigation of doping effects on magnetic properties of the hydrogenated and fluorinated graphene structures by extra charge mimic.
The effects of electron and hole doping on the magnetic properties of hydrogenated and fluorinated graphene structures are theoretically investigated by additional charge mimic. The studied hydrogenated and fluorinated graphene with different electronic structures display different relations between magnetism and charge, in which the spin moment of the former has the maximum value without charg...
متن کاملDoping-driven Mott transition in La1−xSrxTiO3 via simultaneous electron and hole doping of t2g subbands as predicted by LDA+DMFT calculations
The insulator to metal transition in LaTiO3 induced by La substitution via Sr is studied within multiband exact diagonalization dynamical mean field theory at finite temperatures. It is shown that weak hole doping triggers a large interorbital charge transfer, with simultaneous electron and hole doping of t2g subbands. The transition is first order and exhibits phase separation between insulato...
متن کامل