Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-12-25
Physics
Condensed Matter
Strongly Correlated Electrons
13 pages, 16 figures. Corrected version due to inverted picture 3a and 3b. RevTex. Submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.59.13782
We study the temperature dependence of the low temperature spin configurations, investigating the magnetization profile of the local states due to the impurities and the two point correlation function centered in one of the impurities. This correlation is found to be weak against temperature effects although the magnetization profile in the triplet state is visible up to higher temperatures. Here we introduce a loop cluster quantum Monte-Carlo method with a fixed magnetization Mz in order to study the correlations in the ground state of a given value of Mz. From the population distribution of magnetization, the very small energy gap between the quasi degenerate states due to the impurities is obtained.
Miyashita Seiji
Roos Pascal
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