Zhao Duo, Zhao Zhiyuan, Xu Yaohan, Tong Shucheng, Lu Jun, Wei Dahai
State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100190, China.
Nanomaterials (Basel). 2022 Apr 12;12(8):1313. doi: 10.3390/nano12081313.
The transverse magnetoresistance () caused by inhomogeneous superconductivity is symmetric about the magnetic field around the critical magnetic field region. This has caused many disturbances during the study of vortex dynamics by Hall signals. Here, we found that the peak of measured in our samples was induced by the nonuniformity of the superconductors. The peak values of decrease with increasing applied current and temperature, which can be described by the theory of superconductivity inhomogeneity. Based on this, we have proposed and verified a method for separating the transverse voltage caused by the inhomogeneity of superconductivity. Additionally, quantity Δ(0) can also be used to characterize the uniformity of superconductivity. This clears up the obstacles for studying vortex motion dynamics and reveals a way to study the influence of the domain wall on superconductivity.
由非均匀超导性引起的横向磁阻（）在临界磁场区域周围关于磁场是对称的。这在通过霍尔信号研究涡旋动力学的过程中造成了许多干扰。在此，我们发现我们样品中测量到的峰值是由超导体的不均匀性引起的。的峰值随着施加电流和温度的增加而减小，这可以用超导不均匀性理论来描述。基于此，我们提出并验证了一种分离由超导不均匀性引起的横向电压的方法。此外，量Δ(0)也可用于表征超导的均匀性。这清除了研究涡旋运动动力学的障碍，并揭示了一种研究畴壁对超导性影响的方法。
