Decomposition of multilayer superconductivity with interlayer pairing,Physical Review B

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Decomposition of multilayer superconductivity with interlayer pairing
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-10 , DOI: 10.1103/physrevb.110.104507
Yi-feng Yang _{1,

2,

3}

Affiliation

We prove that multilayer superconductivity with interlayer pairing may naturally decompose into a series of weakly coupled bilayer and trilayer superconducting blocks in order to minimize its total free energy. Our work is motivated by the recent proposal of interlayer pairing induced by the interlayer superexchange interaction of nearly half-filled

d_{z^{2}}

orbitals in the bilayer and trilayer nickelate superconductors. We explore general properties of interlayer pairing superconductivity and perform systematic Ginzburg-Landau analyses of an effective multilayer model. For real materials, our results imply strong superconducting order parameter modulation and a short coherence length along the

z

axis (perpendicular to the layers). This reveals a unique feature of multilayer superconductivity with interlayer pairing and provides a basic framework for future experimental and theoretical investigations.

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