五边形格点的几何阻挫和热力学性质

Geometric Frustration and Thermodynamic Properties of Pentagonal Lattices

利用伊辛模型和热力学配分函数研究了由正三角形和正四边形构成的五边形的阻挫现象、自旋关联和磁化微观过程。研究表明:五边形格点中存在阻挫现象;交换强度与磁场的竞争会导致磁矩出现磁化台阶;磁化过程中的微观态会随着交换强度或磁场强度变化出现振荡。

Using the Ising model and the thermodynamic partition function,the frustration phenomenon,spin correlation and magnetization micro-processes of the pentagon composed of regular triangles and regular quadrilaterals are studied.The results show that frustration exists in the pentagonal grid,the competition between the exchange strength and the magnetic field causes the magnetic moment to appear magnetization steps and the microscopic state in the magnetization process will oscillate with the the exchange intensity or magnetic field intensity.