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the suppression of a dark state which is present withoutthe interference. We consider the interplay between thesqueezed field and the vacuum-induced coherence (VIC)between the two possible decay channels. Finally weexamine a narrow spectral feature in the resonancefluorescence of the atom with quantum interference.Người trình bày: Thái Doãn ThanhV. VẬT LÝ TÍNH TOÁN, MÔ PHỎNG VÀMÔ HÌNH HÓA88. Ising spin glass on a FCC lattice: a Monte-CarlosimulationHoàng Đình Tiến, Ngô Văn Thanh, Nguyễn Ái ViệtWe studied the Ising spin glass with bimodalinteractions (±J) in dimension three (3D). Theantiferromagnet FCC Ising model is fully frustratedand has a strong first-order transition if there is nodisorder, it becomes spin glass when introducing asmall interaction disorder P~ 0.03%. We first propose anew technique for calculating the magnetization andsusceptibility from the order parameter Q.Người trình bày: Hoàng Đình Tiến89. Density - Functional Study of Magneto -Structural Correlation in Mn4 Molecules: A wayto develop Single - Modecule MagnetsNguyễn Anh Tuấn, Shin - Inchi Katayama, DamHieu ChiSingle-molecule magnet (SMM) is a molecule that canfunction as magnets below its blocking temperature (T B ).This behavior results from a high ground-state spin (S T )combined with a large and negative axial magnetoanisotropy(D). The S T of SMM results from local spin moments at TMions (S i ) and exchange coupling between them (J ij ).Moreover, J ij have to be important to well separate theground spin state from the excited states; the relative highvalue of T B is dependent on them. To tailor these quantitiesrequires deeply understanding of magneto-structuralcorrelations of SMMs. Previous theoretical studies of SMMsThành phố Đồng Hới (03- 06/8/2009) Trang 77/ 102 Thành phố Đồng Hới (03- 06/8/2009) Trang 78/ 102