Titlebook: Correlation Effects in Low-Dimensional Electron Systems; Proceedings of the 1 Ayao Okiji,Norio Kawakami Conference proceedings 1994 Springe

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頑固

Confined System with 1/,, Exchange Interaction and Its Application to Resonances in Narrow Channelsund-state wavefunction of Jastrow type and the excited-state wavefunctions out of Hermite polynomials. The corresponding energy spectrum is computed exactly. The results are then applied to single-electron charging phenomena in narrow channels of semiconductor nano-structures.

Cupidity

The Role of Symmetries in Systems of Strongly Correlated Electronsonal case) form the fundamental representation of .(2) × .(2). The exact scattering matrix has the same symmetry. By making use of this strong influence of symmetries on the dynamics, it is possible to extend the Hubbard model such that it becomes superconducting. One should add additional nearest n

Cupidity

愉快么

Elementary Excitations for Impurity Models the Kondo problem: the ordinary Anderson model, the orbitally degenerate Anderson model and the multi-channel Kondo model. The calculations for the multi-channel Kondo model are further extended to the case at finite temperatures by means of Yang and Yang’s method developed in one-dimensional inter

漸變

Phase Diagram of the One-Dimensional Kondo-Lattice Modelesults interpolating those limits. In one dimension there are three phases: a ferromagnetic metallic phase, a paramagnetic metallic phase and an insulating spin-liquid phase. Emphasis is placed upon the strong coupling limits which are important to understand the properties of these phases.

因無(wú)茶而冷淡

Variational Wave Functions in the One-Dimensional ,-, Model for Strongly Correlated Regimestate has been studied extensively but it does not have spin-charge separation explicitly. On the other hand, another type of variational wave function is considered, which has the spin-charge separation and is easy to extend to higher dimensions. This trial state has spinless fermions as the charge