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基于t-J-U模型的石墨烯超导特性分析

邹濂军

（陕西理工大学 物理与电信工程学院，陕西 汉中 723001）

栏目：电子工程 · 第 2026 年第 11 期 · 页码：27-32,36 · 2096-4706（2026）11-0027-07 · 中图分类号：TP39；O469 · 文献标识码：A · DOI：10.19850/j.cnki.2096-4706.2026.11.006

摘要

本文基于蜂窝晶格t-J-U模型，采用重整化平均场理论对石墨烯中的非常规超导特性进行了系统研究。通过分析不同掺杂浓度、库仑相互作用及反铁磁交换作用对超导行为的影响，发现超导序参量随空穴掺杂呈现穹顶型分布，最佳掺杂位于范霍夫奇点附近。同时，库仑排斥增强会抑制双占据态，而反铁磁交换作用有助于促进超导配对。在有限温条件下，超导序参量随温度升高逐渐减小并最终消失，超流权重表现出明显的掺杂依赖特征。研究结果表明，二维体系中的相位涨落对超导临界温度具有重要影响。本研究为石墨烯及相关二维材料的超导机理研究提供了理论参考。

关键词

t-J-U模型；重整化平均场理论；石墨烯；超流权重

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作者简介

邹濂军（2001—），男，汉族，江西抚州人，硕士研究生在读，研究方向：凝聚态物理理论。