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arXiv 2303.02152cond-mat.supr-con
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UTe$_2$低场与高场超导相的理论

Theory of the low- and high-field superconducting phases of UTe$_2$

Josephine J. Yu, Yue Yu, Daniel F. Agterberg, Srinivas Raghu

AI总结:

本文针对UTe$_2$沿晶轴$b$施加磁场时出现的两个超导相,采用含晶体对称性与各向异性铁磁交换项的微观双带最小哈密顿量,在平均场理论下研究了其配对对称性与性质。

摘要:

近期核磁共振(NMR)与量热实验观察到,当磁场沿晶轴$b$方向施加时,UTe$_2$随磁场强度变化在两个不同的超导相之间发生转变。为确定这些相的性质,我们采用包含基本晶体对称性与结构细节的微观双带最小哈密顿量,并引入各向异性铁磁交换项。我们在平均场理论中研究了由此产生的低场与高场相的配对对称性与性质。

英文摘要:

Recent nuclear magnetic resonance (NMR) and calorimetric experiments have observed that UTe$_2$ exhibits a transition between two distinct superconducting phases as a function of magnetic field strength for a field applied along the crystalline $b$-axis. To determine the nature of these phases, we employ a microscopic two-band minimal Hamiltonian with the essential crystal symmetries and structural details. We also adopt anisotropic ferromagnetic exchange terms. We study the resulting pairing symmetries and properties of these low- and high-field phases in mean field theory.

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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