arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2408.06178cond-mat.supr-concond-mat.str-el
收藏

笼目超导电性输运研究中的时间反演对称性破缺现象

Time-reversal symmetry-breaking phenomena in transport study of kagome superconductivity

Shuo-Ying Yang, Jia-Xin Yin

AI总结:

本文综述了钒基笼目超导体中时间反演对称性破缺的输运实验证据,并探讨了手性超导序参量和手性配对密度波等可能的物理机制。

摘要:

近期研究发现,钒基笼目超导体($\ extit{A}$V$_{3}$Sb$_{5}$,$\ extit{A}$ = K、Cs、Rb)中的全部三种材料在超导态均表现出时间反演对称性破缺行为。其中,结构为Nb/K$_{1-x}$V$_{3}$Sb$_{5}$/Nb和RbV$_{3}$Sb$_{5}$的约瑟夫森结在超导转变温度以下显示出磁滞现象。CsV$_{3}$Sb$_{5}$则表现出零场超导二极管效应,即正向和负向超导临界电流的大小不同。我们首先讨论上述三个实验之间的异同,然后探讨可能导致这些非常规超导输运现象的机制:例如手性超导序参量,以及由手性电荷序与超导电性交织而产生的手性配对密度波。

英文摘要:

Recent studies have found that all three materials within the vanadium-based kagome superconductors ($\textit{A}$V$_{3}$Sb$_{5}$, $\textit{A}$ = K, Cs, Rb) exhibit time-reversal symmetry-breaking behaviors in the superconducting states. Among the three, the Josephson junctions structured Nb/K$_{1-x}$V$_{3}$Sb$_{5}$/Nb and RbV$_{3}$Sb$_{5}$ show magnetic hysteresis below the superconducting transition temperature. CsV$_{3}$Sb$_{5}$ exhibits a zero-field superconducting diode effect, meaning the magnitude of the positive and negative superconducting critical currents are different. We first discuss the similarities and differences among the three above-mentioned experiments. Then, we discuss the possible mechanisms responsible for the unconventional superconducting transport phenomena: such as a chiral superconducting order parameter, and chiral pair density waves arising from the intertwining of the chiral charge order with superconductivity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑