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arXiv · 2207.06619

Crystallizing Kagome artificial spin ice

Wen-Cheng Yue·Zixiong Yuan·Yang-Yang Lyu·Sining Dong·Jian Zhou·Zhi-Li Xiao·Liang He·Xuecou Tu·Ying Dong·Huabing Wang·Weiwei Xu·Lin Kang·Peiheng Wu·Cristiano Nisoli·Wai-Kwong Kwok·Yong-Lei Wang
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Abstract

Artificial spin ices are engineered arrays of dipolarly coupled nanobar magnets. They enable direct investigations of fascinating collective phenomena from their diverse microstates. However, experimental access to ground states in the geometrically frustrated systems has proven difficult, limiting studies and applications of novel properties and functionalities from the low energy states. Here, we introduce a convenient approach to control the competing diploar interactions between the neighboring nanomagnets, allowing us to tailor the vertex degeneracy of the ground states. We achieve this by tuning the length of selected nanobar magnets in the spin ice lattice. We demonstrate the effectiveness of our method by realizing multiple low energy microstates in a Kagome artificial spin ice, particularly the hardly accessible long range ordered ground state - the spin crystal state. Our strategy can be directly applied to other artificial spin systems to achieve exotic phases and explore new emergent collective behaviors.

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Wen-Cheng Yue, Zixiong Yuan, Yang-Yang Lyu, Sining Dong, Jian Zhou, Zhi-Li Xiao, Liang He, Xuecou Tu, Ying Dong, Huabing Wang, Weiwei Xu, Lin Kang, Peiheng Wu, Cristiano Nisoli, Wai-Kwong Kwok, Yong-Lei Wang. 2022-07-14. Crystallizing Kagome artificial spin ice. https://doi.org/10.1103/physrevlett.129.057202

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