String Phase in an Artificial Spin Ice.
String Phase in an Artificial Spin Ice.
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DOI：
10.1038/s41467-021-26734-6
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发表时间：
2021-11-11
影响因子：
16.6
通讯作者：
Schiffer P
中科院分区：
文献类型：
--
作者：
Zhang X;Duzgun A;Lao Y;Subzwari S;Bingham NS;Sklenar J;Saglam H;Ramberger J;Batley JT;Watts JD;Bromley D;Chopdekar RV;O'Brien L;Leighton C;Nisoli C;Schiffer P
一维局部激发串是强相关拓扑量子物质物理行为的一个令人着迷的特征。在这里，我们研究了相互作用纳米磁体的经典系统中的局部激发串，即人造自旋冰的圣达菲冰几何结构。我们在铁磁居里点附近退火后和热动态状态下测量了纳米磁体的矩配置。虽然圣达菲冰晶格结构很复杂，但我们证明其无序磁态可以在突现弦的框架内自然地描述。我们通过实验证明，弦长度遵循简单的玻尔兹曼分布，其能量尺度与系统的磁相互作用相关，并且与理论预测一致。结果表明，弦描述和相关的拓扑特征并不是量子模型所独有的，而且还可以为具有非平凡挫折的复杂经典系统提供简化描述。局部激发串是强相关拓扑量子物质的有趣特征。在这里，作者表明，玻尔兹曼分布的局部激发串也描述了人造自旋冰的圣达菲几何结构的拓扑物理，这是一个经典的热系统。
One-dimensional strings of local excitations are a fascinating feature of the physical behavior of strongly correlated topological quantum matter. Here we study strings of local excitations in a classical system of interacting nanomagnets, the Santa Fe Ice geometry of artificial spin ice. We measured the moment configuration of the nanomagnets, both after annealing near the ferromagnetic Curie point and in a thermally dynamic state. While the Santa Fe Ice lattice structure is complex, we demonstrate that its disordered magnetic state is naturally described within a framework of emergent strings. We show experimentally that the string length follows a simple Boltzmann distribution with an energy scale that is associated with the system’s magnetic interactions and is consistent with theoretical predictions. The results demonstrate that string descriptions and associated topological characteristics are not unique to quantum models but can also provide a simplifying description of complex classical systems with non-trivial frustration. Strings of local excitations are interesting features of a strongly correlated topological quantum matter. Here, the authors show that Boltzmann-distributed strings of local excitations also describe the topological physics of the Santa Fe geometry of artificial spin ice, which is a classical thermal system.
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影响因子：
2.7
作者：
Henley, Christopher L.
通讯作者：
Henley, Christopher L.
有间隙的磁畴壁、有间隙的边界和拓扑简并
影响因子：
8.6
作者：
Lan, Tian;Wang, Juven C.;Wen, Xiao-Gang
通讯作者：
Wen, Xiao-Gang
影响因子：
16.6
作者：
Farhan A;Petersen CF;Dhuey S;Anghinolfi L;Qin QH;Saccone M;Velten S;Wuth C;Gliga S;Mellado P;Alava MJ;Scholl A;van Dijken S
通讯作者：
van Dijken S
影响因子：
16.6
作者：
Leo N;Holenstein S;Schildknecht D;Sendetskyi O;Luetkens H;Derlet PM;Scagnoli V;Lançon D;Mardegan JRL;Prokscha T;Suter A;Salman Z;Lee S;Heyderman LJ
通讯作者：
Heyderman LJ
影响因子：
8.6
作者：
Chern, Gia-Wei;Morrison, Muir J.;Nisoli, Cristiano
通讯作者：
Nisoli, Cristiano