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arXiv 2303.08520cond-mat.supr-concond-mat.mtrl-scicond-mat.str-el
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拓扑超导体Sn$_4$Au中的二重各向异性超导态

Two-fold anisotropic superconducting state in topological superconductor Sn$_4$Au

M. M. Sharma, Ganesh Gurjar, S. Patnaik, V. P. S. Awana

AI总结:

本研究合成了拓扑超导体Sn$_4$Au单晶,通过磁输运等测量证实其为第二类超导体,发现其超导态下上临界场存在二重各向异性(参数1.26),推测该特性源于材料的层状结构。

摘要:

本文报道了Sn$_4$Au单晶超导态下的各向异性磁输运特性。Sn$_4$Au单晶通过简易熔体生长法合成,其超导特性经电阻-温度测量与直流磁化测量得到证实。等温磁化测量表明Sn$_4$Au属于第二类超导体。面内与面外电阻测量显示,在超导转变温度(T$_c$ = 2.3 K)以下,上临界场表现出各向异性行为;在T$_c$以下不同倾斜角下开展的电阻测量进一步阐明了这种各向异性,测得各向异性参数为1.26。研究结果表明Sn$_4$Au单晶中存在二重各向异性超导态,该特性可能由合成的Sn$_4$Au单晶的层状结构诱导产生。

英文摘要:

Here we report the anisotropic magnetotransport properties in the superconducting state of Sn$_4$Au single crystal. Sn$_4$Au single crystal is synthesized through an easy melt growth method. Superconducting properties are evidenced by resistivity vs. temperature and DC magnetization measurements. Isothermal magnetization measurements hint toward type-II superconductivity in Sn$_4$Au. In-plane and out-of-plane resistivity measurements show anisotropic behavior of the upper critical field at temperatures below superconducting transition (T$_c$ = 2.3 K). The observed anisotropy is more elucidated in resistivity measurements performed below Tc at different tilt angles. The anisotropy parameter is found to be 1.26. The observed results show the presence two-fold anisotropic superconducting state in Sn$_4$Au single crystal, which may be induced due to the layered structure of synthesized Sn$_4$Au single crystal.

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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