Solitonic Spin-Liquid State Due to the Violation of the Lifshitz Condition in Fe(1+y)Te.
Solitonic Spin-Liquid State Due to the Violation of the Lifshitz Condition in Fe(1+y)Te.
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Fe(1 y)Te 中违反 Lifshitz 条件导致的孤子自旋液态
DOI：
10.1103/physrevlett.115.177203
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发表时间：
2015
影响因子：
8.6
通讯作者：
S. Rößler
中科院分区：
文献类型：
--
作者：
Ph. Materne;C. Koz;U. K. Rößler;M. Doerr;T. Goltz;H. H. Klauss;U. Schwarz;S. Wirth;S. Rößler
唯象分析和穆斯堡尔谱学实验相结合的四方晶系表明，在具有较高Fe过量的化合物中，磁有序转变是非常规的。在实验上，一个类液体的磁性前体与准静态自旋秩序被发现从显着增宽的穆斯堡尔谱在温度以上的反铁磁转变。无公度自旋密度波级用磁自由能来描述，它违反了朗道二级跃迁理论中的弱Lifshitz条件。多个Lifshitz不变量的存在提供了机制，以创建多维的，扭曲的，调制的孤子相位。
A combination of phenomenological analysis and Mössbauer spectroscopy experiments on the tetragonalsystem indicates that the magnetic ordering transition in compounds with higher Fe excess,, is unconventional. Experimentally, a liquidlike magnetic precursor with quasistatic spin order is found from significantly broadened Mössbauer spectra at temperatures above the antiferromagnetic transition. The incommensurate spin-density wave order inis described by a magnetic free energy that violates the weak Lifshitz condition in the Landau theory of second-order transitions. The presence of multiple Lifshitz invariants provides the mechanism to create multidimensional, twisted, and modulated solitonic phases.