Journal Article

Directionally Independent Energy Gap Formation Due to the Hyperfine Interaction

Seiji Miyashita, Hans De Raedt and Kristel Michielsen

in Progress of Theoretical Physics

Published on behalf of The Physical Society of Japan

Volume 110, issue 5, pages 889-899
Published in print November 2003 | ISSN: 0033-068X
Published online November 2003 | e-ISSN: 1347-4081 | DOI: http://dx.doi.org/10.1143/PTP.110.889
Directionally Independent Energy Gap Formation Due to the Hyperfine Interaction

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We study energy gap formation at the level-crossing point due to the hyperfine interaction. In contrast to the energy gap induced by the Dzyaloshinskii-Moriya interaction, the gap induced by the hyperfine interaction is independent of the direction of the magnetic field. We also study the dynamics of the magnetization under a time dependent field that changes at a constant rate.

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