arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2210.06308cond-mat.str-elcond-mat.mtrl-sci
收藏

依赖时间的交换创造了物质的时间受挫状态

Time-dependent exchange creates the time-frustrated state of matter

V. E. Valiulin, N. M. Chtchelkatchev, A. V. Mikheyenkov, V. M. Vinokur

摘要:

由磁矩之间的交换相互作用支配的磁系统具有导致基态简并导致新的拓扑状态(通常被称为物质的受抑状态(FSM))的受抑。通常讨论的磁系统中的挫折有一个空间起源。在这里,我们证明了一个阵列的纳米磁体耦合的真正延迟交换相互作用开发一个新的物质状态,时间阻挫物质(TFM)。在具有含时延迟交换相互作用的自旋系统中,单个自旋翻转不是立即影响其他自旋,而是经过一定的延迟。这意味着交换相互作用的符号变化,导致铁磁或反铁磁相互作用,取决于时间。因此,系统的时间演化本质上是非马尔可夫的。不同磁序之间正在出现的竞争导致了一种新的时间核心挫折。为了建立这种范式的转变,我们专注于示范性的系统,一个颗粒状的多铁性,其中的交换传输介质具有明显的频率色散,因此开发的TFM。

英文摘要:

Magnetic systems governed by exchange interactions between magnetic moments harbor frustration that leads to ground state degeneracy and results in the new topological state often referred to as a frustrated state of matter (FSM). The frustration in the commonly discussed magnetic systems has a spatial origin. Here we demonstrate that an array of nanomagnets coupled by the real retarded exchange interactions develops a new state of matter, time frustrated matter (TFM). In a spin system with the time-dependent retarded exchange interaction, a single spin-flip influences other spins not instantly but after some delay. This implies that the sign of the exchange interaction changes, leading to either ferro- or antiferromagnetic interaction, depends on time. As a result, the system's temporal evolution is essentially non-Markovian. The emerging competition between different magnetic orders leads to a new kind of time-core frustration. To establish this paradigmatic shift, we focus on the exemplary system, a granular multiferroic, where the exchange transferring medium has a pronounced frequency dispersion and hence develops the TFM.

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。

↑