Theory for Slightly Doped Antiferromagnetic Mott Insulators

Abstract

Trial wavefunctions, constructed explicitly from the unique 2-dimensional Mott insulating state with antiferromagnetic order, are proposed to describe the low-energy states of a Mott insulator slightly doped with holes or electrons. With the state behaving like charged quasi-particles with well-defined momenta, a rigid band is observed. These states have much less pairing correlations than previously studied ones. Small Fermi patches obtained are consistent with recent experiments on high Tc cuprates doped lightly with holes or electrons. States showing the incoherent and spin-bag behaviors are also discussed. Using these wavefunctions, a number of results obtained by exact calculations are reproduced.

12 (RevTex preprint) pages plus 4 (.jpg) figures. For the MOS2002 proceedings. Figures in much better quality can be requested by contacting directly the authors

References in corpus (17)

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• Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities
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• Comparison of 32-site exact diagonalization results and ARPES spectral functions for the AFM insulator $S{r}_{2}Cu{O}_{2}C{l}_2$
• A comprehensive numerical and analytical study of two holes doped into the 2D t-J model
• Qualitative understanding of the sign of t' asymmetry in the extended t-J Model and relevance for pairing properties
• Phase Separation of the Two-Dimensional t-J model
• Low energy states with different symmetries in the t-J model with two holes on a 32-site lattice

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• Disappearance of Nodal Gap across the Insulator-Superconductor Transition in a Copper-Oxide Superconductor
• Competition between antiferromagnetism and superconductivity, electron-hole doping asymmetry and "Fermi Surface" topology in cuprates
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• Uniform Mixing of Antiferromagnetism and High-Tc Superconductivity in Electron-doped Layers in Four-layered Ba2Ca3Cu4O8F2 : A New Phenomenon in an Electron Underdoped RegimePhenomenon in an Electron Underdoped Regime
• Two-mode variational Monte Carlo study of Quasiparticle excitations in cuprates
• Particle number renormalization in almost half filled Mott Hubbard superconductors
• Systematic Low-Energy Effective Field Theory for Electron-Doped Antiferromagnets
• Spectral Weights, d-wave Pairing Amplitudes, and Particle-hole Tunneling Asymmetry of a Strongly Correlated Superconductor
• High-T_c Superconductivity with T_c = 52 K under Antiferromagnetic Order in Five-layered Cuprate Ba_2Ca_4Cu_5O_10(F,O)_2 with T_N = 175 K: 19F- and Cu-NMR Studies
• Doping dependence of the electron-doped cuprate superconductors from the antiferromagnetic properties of the Hubbard model
• Antiferromagnetic phase transition in four-layered high-T_c superconductors Ba_2Ca_3Cu_4O_8(F_yO_{1-y})_2 with T_c=55-102 K: Cu- and F-NMR studies
• Uniform mixing of antiferromagnetism and high-T_c superconductivity in multilayered copper oxides Ba_2Ca_{n-1}Cu_nO_{2n}F_2 with apical fluorines (n=2,3,4): Cu-NMR/NQR and F-NMR
• Numerical Investigation of Spin Excitations in a Doped Spin Chain
• Spin dynamics in the antiferromagnetic phase for electron-doped cuprate superconductors
• Band-Renormalization Effects and Predominant Antiferromagnetic Order in Two-Dimensional Hubbard Model
• High-Tc superconductivity and antiferromagnetism in multilayer cuprates: 63Cu- and 19F-NMR on five-layer Ba2Ca4Cu5O10(F,O)2
• d-wave pairing in lightly doped Mott insulators
• Low-energy spectra in the t-J type models at light doping
• Disorder-driven quantum phase transition from antiferromagnetic metal to insulating state in multilayered high-Tc cuprate (Cu,C)Ba2Ca4Cu5Oy
• Signatures of strong correlation effects in RIXS on Cuprates
• Topological Order in Gutzwiller Projected Wave Functions for Quantum Antiferromagnets
• Topological Order in Projected Wave Functions and Effective Theories of Quantum Antiferromagnets
• Low-energy Spectra of the t-J-Type Models Studied by Variational Approach
• Revisit of Antiferromagnetism in Hubbard Model by A Cluster Slave-Spin Method
• Coexistence of superconductivity and antiferromagnetism in self-doped bilayer t-t'-J model
• Novel Superconducting Phases in Copper Oxides and Iron-oxypnictides: NMR Studies
• Long-Range Coulomb Effect on the Antiferromagnetism in Electron-doped Cuprates
• Ising t-J model close to half filling: A Monte Carlo study
• The Ising version of the t-J model
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• Insulator-metal transition and quasi-flat-band of Shastry-Sutherland lattice
• Antiferromagnetism and singlet formation in underdoped high-Tc cuprates: Implications for superconducting pairing