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η-pairing on square and triangular lattices
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DOI：10.1103/PhysRevB.107.184512.png)
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The 17-pairing is a type of Cooper pairing state in which the phase of the superconducting order parameter is aligned in a staggered manner, in contrast to the usual BCS superconductors with a spatially uniform phase. In this study, we search for a characteristic 17-pairing state in a triangular lattice where a simple staggered alignment of the phase is not possible. As an example, we consider the attractive Hubbard model on both the square and triangular lattices under a strong external Zeeman field. Using the mean-field approximation, we have identified several 17-pairing states. Additionally, we have examined the electromagnetic stability of the pairing state by calculating the Meissner kernel. Odd-frequency pairing plays a crucial role in achieving a diamagnetic response if the electrons experience a staggered superconducting phase during the propagation of current.
Keyword:
HUBBARD-MODEL
SUPERCONDUCTOR
INSULATOR
DENSITY
SYSTEMS
PHYSICS
FILMS
LIMIT
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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引用论文
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