Abstract
In the vicinity of hole density 1/8, La-based high- T c cuprates exhibit long-range order of incommensurate antiferromagnetism (IC-AF). Motivated by this observation, we explore the possible stabilization of IC-AF ordering due to the existence of static charge density modulation (CDM). We use Ginzburg-Landau free energy based on the mean field theory of the t - J model. We show numerically that three kinds of CDMs, including a stripe pattern, can stabilize static IC-AF ordering. We also argue that such CDMs can cause the saturation of the degree of incommensurability (η) for IC-AF fluctuation as a function of hole density. In our framework, the effects of the low-temperature tetragonal (LTT) structure only appear as a slight increase of η for the stripe pattern.
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