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arXiv · 2307.08194

Electronic Noise of a Single Skyrmion

Kang Wang·Yiou Zhang·Vineetha Bheemarasetty·See-Chen Ying·Gang Xiao
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Abstract

To enable the practical use of skyrmion-based devices, it is essential to achieve a balance between energy efficiency and thermal stability, while also ensuring reliable electrical detection against noise. Understanding how a skyrmion interacts with material disorder and external perturbations is thus essential. Here we investigate the electronic noise of a single skyrmion under the influence of thermal fluctuations and spin currents in a magnetic thin film. We detect the thermally induced noise with a 1/f signature in the strong pinning regime but a random telegraph noise in the intermediate pinning regime. Both the thermally dominated and current-induced telegraph-like signals are detected in the weak pinning regime. Our results provide a comprehensive electronic noise picture of a single skyrmion, demonstrating the potential of noise fluctuation as a valuable tool for characterizing the pinning condition of a skyrmion. These insights could also aid in the development of low-noise and reliable skyrmion-based devices.

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Kang Wang, Yiou Zhang, Vineetha Bheemarasetty, See-Chen Ying, Gang Xiao. 2023-07-17. Electronic Noise of a Single Skyrmion. https://arxiv.org/abs/2307.08194

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