超导壁纸费米子体系中在位与离位配对相及表面谱之间的竞争
Competition between on-site and off-site pairing phases and surface spectra in superconducting wallpaper fermion systems
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中文总结 AI 辅助
该研究理论探究了含壁纸费米子的超导拓扑晶体绝缘体中在位与离位配对相的竞争，发现不同配对相的谱杂化会产生扭曲色散，且该色散在离位配对作用下仍存在。
中文摘要 AI 辅助
我们从理论上研究了具有壁纸费米子的超导拓扑晶体绝缘体中在位配对与离位配对之间的竞争，壁纸费米子是一类由非幺正对称保护的表面态。面内最近邻对跳跃稳定了A₁ᵤ相，而离位配对通道则产生了具有B₂ᵤ和Eᵤ表示的额外主导相。我们进一步表明，B₂ᵤ配对态支持壁纸费米子谱自身的杂化，而具有时间反演不变性的向列型Eᵤ态则表现出壁纸费米子与双马约拉纳克拉默斯对之间的谱杂化，产生扭曲的表面能谱。这些结果证明，由杂化现象产生的扭曲色散在离位配对相互作用存在时依然存在。
英文摘要
We theoretically investigate the competition between on-site and off-site pairings in superconducting topological crystalline insulators hosting wallpaper fermions, a class of surface states protected by nonsymmorphic symmetries. In-plane nearest-neighbor pair hopping stabilizes the $\mathrm{A_{1u}}$ phase, while off-site pairing channels yield additional dominant phases with $\mathrm{B_{2u}}$ and $\mathrm{E_u}$ representations. We further show that the $\mathrm{B_{2u}}$ pairing state supports the hybridization between wallpaper-fermion spectra themselves, whereas a representative time-reversal-invariant nematic $\mathrm{E_u}$ state exhibits spectral hybridization between wallpaper fermion and double Majorana Kramers pairs, yielding twisted surface energy spectra. These results demonstrate that the twisted dispersions arising from hybridization phenomena persist in the presence of off-site pairing interactions.
发表机构
- Nagoya University（名古屋大学）
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