Zhang Enze, Xu Xian, Zou Yi-Chao, Ai Linfeng, Dong Xiang, Huang Ce, Leng Pengliang, Liu Shanshan, Zhang Yuda, Jia Zehao, Peng Xinyue, Zhao Minhao, Yang Yunkun, Li Zihan, Guo Hangwen, Haigh Sarah J, Nagaosa Naoto, Shen Jian, Xiu Faxian
State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China.
Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai, 200433, China.
Nat Commun. 2020 Nov 6;11(1):5634. doi: 10.1038/s41467-020-19459-5.
The rise of two-dimensional (2D) crystalline superconductors has opened a new frontier of investigating unconventional quantum phenomena in low dimensions. However, despite the enormous advances achieved towards understanding the underlying physics, practical device applications like sensors and detectors using 2D superconductors are still lacking. Here, we demonstrate nonreciprocal antenna devices based on atomically thin NbSe. Reversible nonreciprocal charge transport is unveiled in 2D NbSe through multi-reversal antisymmetric second harmonic magnetoresistance isotherms. Based on this nonreciprocity, our NbSe antenna devices exhibit a reversible nonreciprocal sensitivity to externally alternating current (AC) electromagnetic waves, which is attributed to the vortex flow in asymmetric pinning potentials driven by the AC driving force. More importantly, a successful control of the nonreciprocal sensitivity of the antenna devices has been achieved by applying electromagnetic waves with different frequencies and amplitudes. The device's response increases with increasing electromagnetic wave amplitude and exhibits prominent broadband sensing from 5 to 900 MHz.
二维（2D）晶体超导体的兴起开启了在低维度研究非常规量子现象的新前沿。然而，尽管在理解其 underlying 物理方面取得了巨大进展，但仍缺乏使用 2D 超导体的诸如传感器和探测器等实际器件应用。在此，我们展示了基于原子级薄 NbSe 的非互易天线器件。通过多反转反对称二次谐波磁阻等温线揭示了 2D NbSe 中的可逆非互易电荷传输。基于这种非互易性，我们的 NbSe 天线器件对外加交流（AC）电磁波表现出可逆的非互易灵敏度，这归因于由 AC 驱动力驱动的非对称钉扎势中的涡旋流。更重要的是，通过应用不同频率和幅度的电磁波成功实现了对天线器件非互易灵敏度的控制。器件的响应随电磁波幅度的增加而增加，并在 5 至 900 MHz 范围内表现出显著的宽带传感。
