The c-axis charge transport of the hole doped triangular antiferromagnet is investigated within the t-J model by considering the incoherent interlayer hopping. It is shown that the c-axis charge transport of the hole ...The c-axis charge transport of the hole doped triangular antiferromagnet is investigated within the t-J model by considering the incoherent interlayer hopping. It is shown that the c-axis charge transport of the hole doped triangular antiferromagnet is essentially determined by the scattering from the in-plane fluctuation. The c-axis conductivity spectrum shows a low-energy peak and the unusual high-energy broad band, while the c-axis resistivity is characterized by a crossover from the high temperature metallic-like behavior to the low temperature insulating-like behavior, which is qualitatively consistent with those of the hole doped square lattice antiferromagnet.展开更多
Three new MOFs with the same components but different structures and magnetic behavior, {[Cu6（atr）6（H20）2（,u3- OH）2（SOa）5]＇5.25H20}n （1）, {[Cu2（atr）2（,t/-OH）2（SOa）].3H20}n （2）, and {[CuT（atr）6（H2...Three new MOFs with the same components but different structures and magnetic behavior, {[Cu6（atr）6（H20）2（,u3- OH）2（SOa）5]＇5.25H20}n （1）, {[Cu2（atr）2（,t/-OH）2（SOa）].3H20}n （2）, and {[CuT（atr）6（H20）6（fl3-OH）2（SOn）6].2H20}n （3） （atr= 4-amino-l,2,4-triazole）, were respectively synthesized by diffusion reactions in the presence of different structure-directing agents. Complex 1 is a slightly spin-frustrated antiferromagnetic layer with sulfonate aggregated Cun6 clusters periodically ex- tended by ditopic sulfonate linkers. 2 is a grid-based coplanar sheet with hydroxyl group bridged -CuOCu- linear-chain inter- linked by pairs of p3-atr ligands, exhibiting strong antiferromagnetic interactions to lead to an S = 0 spin ground state at low temperature. In contrast, air-instable 3 has a ladder-like broad-ribbon structure constructed from triangular CuII3 cores and cen- trosymmetric CuII1 octahedra. Obviously, the variable Cun-ligand connectivity and the involving magnetic properties are sig- nificantly dominated by the cooperative and variable binding modes of the mixed sulfonate-atr ligands and bi-/tridentate bridging hydroxyl heterobridges.展开更多
文摘The c-axis charge transport of the hole doped triangular antiferromagnet is investigated within the t-J model by considering the incoherent interlayer hopping. It is shown that the c-axis charge transport of the hole doped triangular antiferromagnet is essentially determined by the scattering from the in-plane fluctuation. The c-axis conductivity spectrum shows a low-energy peak and the unusual high-energy broad band, while the c-axis resistivity is characterized by a crossover from the high temperature metallic-like behavior to the low temperature insulating-like behavior, which is qualitatively consistent with those of the hole doped square lattice antiferromagnet.
基金supported by the National Natural Science Foundation of China (20703030, 20871092)the Program for New Century Excellent Talents in University (NCET-08-0914)the Natural Science Foundation of Tianjin (10JCZDJC21600 and 10JCYBJC04800)
文摘Three new MOFs with the same components but different structures and magnetic behavior, {[Cu6（atr）6（H20）2（,u3- OH）2（SOa）5]＇5.25H20}n （1）, {[Cu2（atr）2（,t/-OH）2（SOa）].3H20}n （2）, and {[CuT（atr）6（H20）6（fl3-OH）2（SOn）6].2H20}n （3） （atr= 4-amino-l,2,4-triazole）, were respectively synthesized by diffusion reactions in the presence of different structure-directing agents. Complex 1 is a slightly spin-frustrated antiferromagnetic layer with sulfonate aggregated Cun6 clusters periodically ex- tended by ditopic sulfonate linkers. 2 is a grid-based coplanar sheet with hydroxyl group bridged -CuOCu- linear-chain inter- linked by pairs of p3-atr ligands, exhibiting strong antiferromagnetic interactions to lead to an S = 0 spin ground state at low temperature. In contrast, air-instable 3 has a ladder-like broad-ribbon structure constructed from triangular CuII3 cores and cen- trosymmetric CuII1 octahedra. Obviously, the variable Cun-ligand connectivity and the involving magnetic properties are sig- nificantly dominated by the cooperative and variable binding modes of the mixed sulfonate-atr ligands and bi-/tridentate bridging hydroxyl heterobridges.
