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Heavy Quasiparticles in the Anderson Lattice Model
K. Tsutsui, Y. Ohta, R. Eder +3
An exact-diagonalization technique on small clusters is used to study the dynamics of the one-dimensional symmetric Anderson lattice model. Our calculated excitation spectra reprod…
Excitation Spectra of the Negative-U Hubbard Model: A Small-Cluster Study
Y. Ohta, A. Nakauchi, R. Eder +2
An exact-diagonalization technique on small clusters is used to study low-lying excitations and superconductivity in the two-dimensional negative- Hubbard model. We first calcul…
Inverse photoemission in strongly correlated electron systems
R. Eder, Y. Ohta
Based on exact results for small clusters of 2D t-J model we demonstrate the existence of several distinct `channels' in its inverse photoemission (IPES) spectrum. Hole-like quasip…
Ground state properties and dynamics of the bilayer t-J model
R. Eder, Y. Ohta, S. Maekawa
We present an exact diagonalization study of bilayer clusters of t-J model. Our results indicate a crossover between two markedly different regimes which occurs when the ratio J_pe…
Anomalous Spin and Charge Dynamics of the 2D t-J Model at low doping
R. Eder, Y. Ohta, S. Maekawa
We present an exact diagonalization study of the dynamical spin and density correlation function of the 2D t-J model for hole doping < 25%. Both correlation functions show a remark…