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arXiv 1706.04538cond-mat.str-elhep-phhep-th
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三维反铁磁体在外磁场和交错磁场中的双圈自由能

Two-loop free energy of three-dimensional antiferromagnets in external magnetic and staggered fields

Tomas Brauner, Christoph P. Hofmann

摘要:

利用与模型无关的低能有效场论,我们计算了三维反铁磁体在相互垂直的外磁场和交错排列的场的组合下的自由能.重正化是解析地进行的,并且明确地检查了结果的重整化群不变性。因此,自由能仅用温度、外部场和一组低能耦合常数来表示,这些常数通过实验或与给定混凝土材料的微观模型相匹配来确定。

英文摘要:

Using a model-independent low-energy effective field theory, we calculate the free energy of three-dimensional antiferromagnets in a combination of mutually perpendicular external magnetic and staggered fields at the next-to-next-to-leading, two-loop order. Renormalization is carried out analytically, and the renormalization group invariance of the result is checked explicitly. The free energy is thus expressed solely in terms of temperature, the external fields, and a set of low-energy coupling constants, to be determined by experiment or by matching to the microscopic model of a given concrete material.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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