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Spin-spin correlations in the tt'-Hubbard model

Husslein, Thomas, Newns, Dennis M., Matuttis, H. G., Pattnaik, Pratap C., Morgenstern, Ingo, Singer, Johannes Maria, Fettes, Werner and Baur, C. (1994) Spin-spin correlations in the tt'-Hubbard model. Journal de Physique 1 4 (11), pp. 1573-1576.

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We present calculations of the tt'-Hubbard model using Quantum Monte Carlo techniques. The parameters are chosen so that the van Hove Singularity in the density of states and the Fermi level coincide. We study the behaviour of the system with increasing Hubbard interaction U. Special emphasis is on the spin-spin correlation (SSC). Unusual behaviour for large U is observed there and in the momentum distribution function ( n(q)).

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Item type:Article
Date:November 1994
Institutions:Physics > Institute of Theroretical Physics > Professor Morgenstern
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Dewey Decimal Classification:500 Science > 530 Physics
Created at the University of Regensburg:Unknown
Item ID:16255
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