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Effects of a magnetic field in Kondo insulators: An exact diagonalization study of the Anderson lattice model by K. Tsutsui; Y. Ohta; R. Eder; S. Maekawa; E. Dagotto; J. Riera is a Physics and Astronomy article available to read on EtoBox.

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We study the low-energy excitation spectra in the Anderson lattice model by using an exact diagonalization technique on small clusters. We focus on effects of a magnetic field on the single-particle excitation spectra in the so-called Kondo insulators. In contrast to the hybridization band picture, our calculated results show that the gap in the single-particle excitations remains open until the f-electrons are fully polarized. The magnetization comes mainly from the f-electron spin polarization, which is caused by the large spectral-weight change in the upper and lower Hubbard bands of the nearly localized f electrons.

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Author

K. Tsutsui; Y. Ohta; R. Eder; S. Maekawa; E. Dagotto; J. Riera

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4526)

Published

1997

Language

EN

Field

Physics and Astronomy (Physical Sciences)