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arXiv 2403.17482cond-mat.supr-concond-mat.mes-hall
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非常规p波磁体-超导体异质结构中的隧穿谱理论

Theory of Tunneling Spectroscopy in Unconventional $p$-wave Magnet-Superconductor Hybrid Structures

Kazuki Maeda, Bo Lu, Keiji Yada, Yukio Tanaka

AI总结:

该研究理论分析了二维非常规p波磁体-超导体结的隧穿电导特性,发现不同配对对称性超导体的零偏压电导对磁自旋劈裂强度的响应存在差异,为识别非常规超导体配对对称性提供了有效方法。

摘要:

我们从理论上研究了由二维非常规p波磁体(UPM)和超导体(SC)构成的结在不同配对对称性下的隧穿电导。在d_{xy}波和p_{x}波超导体结中,由无色散表面安德列夫束缚态(SABSs)产生的零偏压电导峰对磁自旋劈裂强度α_{y}的变化不敏感。此外,对于手性p波或手性d波超导体,零偏压电导随α_{y}呈现非单调变化,表明存在色散型SABSs。我们基于UPM得到的隧穿谱结果为识别非常规超导体的配对对称性提供了有效途径。值得注意的是,我们所使用的UPM哈密顿量也适用于持续自旋螺旋系统。

英文摘要:

We theoretically study the tunneling conductance of a junction consisting of a two-dimensional unconventional $p$-wave magnet (UPM) and a superconductor (SC) for various pairing symmetries. The zero bias conductance peaks arising from the dispersionless surface Andreev bound states (SABSs) in $d_{xy}$-wave and $p_{x}$-wave superconductor junctions are insensitive against varying the magnetic spin-splitting strength $α_{y}$. Moreover, for chiral $p$- or chiral $d$-wave SCs, zero bias conductance shows a non-monotonic change as a function of $α_{y}$ indicating the existence of the dispersive SABSs. Our obtained results of tunneling spectroscopy based on a UPM serve as an effective way for the identification of the pairing symmetries of unconventional superconductors. It is noted that our used Hamiltonian of UPM is also available for persistent spin helix systems.

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。

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