Charge stripe manipulation of superconducting pairing symmetry transition

Chao Chen, Peigeng Zhong, Xuelei Sui, Runyu Ma, Ying Liang, Shijie Hu (), Tianxing Ma (), Hai-Qing Lin and Bing Huang ()
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Chao Chen: Beijing Normal University
Peigeng Zhong: Beijing Computational Science Research Center
Xuelei Sui: Beijing Computational Science Research Center
Runyu Ma: Beijing Normal University
Ying Liang: Beijing Normal University
Shijie Hu: Beijing Normal University
Tianxing Ma: Beijing Normal University
Hai-Qing Lin: Beijing Normal University
Bing Huang: Beijing Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Charge stripes have been widely observed in many different types of unconventional superconductors, holding varying periods ( $${{\mathcal{P}}}$$ P ) and intensities. However, a general understanding on the interplay between charge stripes and superconducting properties is still incomplete. Here, using large-scale unbiased numerical simulations on a general inhomogeneous Hubbard model, we discover that the charge-stripe period $${{\mathcal{P}}}$$ P , which is variable in different real material systems, could dictate the pairing symmetries—d wave for $${{\mathcal{P}}}\ge 4,s$$ P ≥ 4 , s and d waves for $${{\mathcal{P}}}\le 3$$ P ≤ 3 . In the latter, tuning hole doping and charge-stripe amplitude can trigger a d-s wave transition and magnetic-correlation shift, where the d-wave state converts to a pairing-density wave state, competing with the s wave. These interesting phenomena arise from an unusual stripe-induced selection rule of pairing symmetries around on-stripe region and within inter-stripe region, giving rise to a critical point of $${{\mathcal{P}}}=3$$ P = 3 for the phase transition. In general, our findings offer important insights into the differences in the superconducting pairing mechanisms across many $${{\mathcal{P}}}$$ P -dependent superconducting systems, highlighting the decisive role of charge stripe.

Date: 2024
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DOI: 10.1038/s41467-024-53841-x

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