AI 中文总结
研究三层1T'-MoTe₂超导体渗流转变区的三阶非线性输运，发现其与超导态相关，可作为渗流系统超导转变的灵敏探针，为强关联系统高阶输运研究奠基。
AI 中文摘要
由于维度降低、量子涨落增强及复杂的电子-声子相互作用，渗流超导现象常出现在二维范德华材料中，形成正常电子与库珀对共存的独特平台。我们报道了在三层1T'-MoTe₂超导体的渗渡转变区域内观测到显著的三阶非线性输运现象：三次谐波纵向电压（V∥³ᵠ）在阈值以下呈现出与激励电流的明确立方依赖关系，其幅值与非线性系数均与超导态密切相关。这种非线性响应可通过含时金兹堡-朗道理论中的超导涨落半定量描述，其中非线性输运源于涨落的库珀对。我们的结果表明，三阶非线性输运可作为渗流系统中超导转变的灵敏探针，并为探索强关联系统中的高阶输运现象奠定基础。
英文摘要
Percolative superconductivity frequently arises in two-dimensional van der Waals materials due to reduced dimensionality, enhanced quantum fluctuations, and complex electron-phonon interactions, providing a unique platform where normal electrons coexist with Cooper pairs. We report the observation of substantial third-order nonlinear transport in a trilayer $1T^\prime$-MoTe$_2$ superconductor within its percolative transition regime. The third-harmonic longitudinal voltage ($V_{\|}^{3ω}$) exhibits a clear cubic dependence on excitation current below a threshold, with both its magnitude and nonlinear coefficient strongly correlated with the superconducting state. This nonlinear response is semiquantitatively captured by the superconducting fluctuation within the time-dependent Ginzburg-Landau theory, where nonlinear transport arises due to fluctuating Cooper pairs. Our results demonstrate that third-order nonlinear transport serves as a sensitive probe of superconducting transitions in percolative systems and establish a foundation for exploring higher-order transport phenomena in strongly correlated systems.
Journal refPhys. Rev. Lett. 137, 056201 (2026)
