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arXiv · 2304.14254

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·Bing Huang
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Abstract

Charge stripes have been widely observed in many different types of unconventional superconductors, holding varying periods ($\mathcal{P}$) 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 $\mathcal{P}$, which is variable in different real material systems, could dictate the pairing symmetries -- $d$ wave for $\mathcal{P} \ge 4$, $s$ and $d$ waves for $\mathcal{P} \le 3$. 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 $\mathcal{P}=3$ for the phase transition. In general, our findings offer new insights into the differences in the superconducting pairing mechanisms across many $\mathcal{P}$-dependent superconducting systems, highlighting the decisive role of charge stripe.

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Chao Chen, Peigeng Zhong, Xuelei Sui, Runyu Ma, Ying Liang, Shijie Hu, Tianxing Ma, Hai-Qing Lin, Bing Huang. 2023-04-27. Charge Stripe Manipulation of Superconducting Pairing Symmetry Transition. https://doi.org/10.1038/s41467-024-53841-x

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