Anomalous Spin Dynamics in Doped Quantum Antiferromagnets

Abstract

Finite-temperature spin dynamics in planar t-J model is studied using the method based on the Lanczos diagonalization of small systems. Dynamical spin structure factor at moderate dopings shows the coexistence of free-fermion-like and spin-fluctuation timescales. At T<J, the low-frequency and static susceptibility show pronounced T dependence, supporting a scenario, related to the marginal Fermi-liquid one, for the explanation of neutron-scattering and NMR-relaxation experiments in cuprates. Calculated NMR relaxation rates reasonably reproduce experimental ones.

10 pages + 4 figures, Postscript in uuencoded compressed tar file, IJS-TP-94/24

References in corpus (5)

• Correlated Electrons in High Temperature Superconductors
• Toward a Unified Magnetic Phase Diagram of the Cuprate Superconductors
• Evidence for Spin-Charge Separation in the Two-Dimensional T-J Model
• Quantum Critical Scaling in a Moderately Doped Antiferromagnet
• Theory of Nuclear Spin-Lattice Relaxation in La${}_2$CuO${}_4$ at High Temperatures

Cited by in corpus (23)

• Anomalous low doping phase of the Hubbard model
• Low Temperature Lanczos Method
• Thermodynamic properties of the planar $t-J$ model
• Electronic spectrum in high-temperature cuprate superconductors
• Exchange and spin-fluctuation superconducting pairing in cuprates
• On the theory of superconductivity in the extended Hubbard model: Spin-fluctuation pairing
• Charge Dynamics in the Planar t-J Model
• Universal Charge and Spin Response in Optimally Doped Antiferromagnets
• Spin fluctuations and high-temperature superconductivity in cuprates
• Composite Operator Method analysis of the underdoped cuprates puzzle
• Universal Spin Response in Copper Oxide Materials
• Spin diffusion of the t-J model
• Electron Green's Function in the Planar t-J Model
• Pseudogap Induced Antiferromagnetic Spin Correlation in High-Temperature Superconductors
• Raman Response in Doped Antiferromagnets
• VBS State Induced by Impurity Frustration in Cr8Ni
• Spin dynamics in paramagnetic diluted magnetic semiconductors
• Magnetization Plateau in the S=1 Spin Ladder with Competing Interactions
• Pseudo-gap behavior in dynamical properties of high-Tc cuprates
• Spin Dynamics for the t-J Model
• Spin polaron in a magnetic field
• On the universal optical conductivity and single-particle relaxation in cuprates
• Influence of the additional second neighbor hopping on the spin response in the t-J model