发表机构
University of Chicago; Florida Atlantic University（芝加哥大学; 佛罗里达大西洋大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出“双母体”能量学框架，利用一阶相变简并性解释晶体石墨烯中超导性广泛但局限于边界区域的谜团，无需指定配对吸引细节，并指出超导会选择净自由能增益最大的正常态母体。
AI 中文摘要
晶体石墨烯的一个核心谜团是，为什么超导性如此普遍，却常常局限于不同同位旋有序金属之间边界附近的奇异狭长区域。在本文中，我们应用了一个“双母体”能量学框架，并表明该框架可以在不指定必然存在的配对吸引细节的情况下解释这种不寻常的超导形式。一阶相变在此至关重要：当两个正常同位旋有序态在自由能上简并时，即使很小的净超导能量增益也可能稳定一个平衡超导体。我们证明了这是如何可能的，尽管配对带来的小能量增益因重建正常金属（这是实现超导兼容性所必需的）的代价而减少。一阶简并性还给超导性提供了在两个正常态母体之间进行选择的机会，倾向于选择净自由能增益最大的那个态。
英文摘要
A central mystery of crystalline graphene is why superconductivity is so widespread yet often confined to strange slivers near boundaries between distinct isospin-ordered metals. In this paper, we apply a ``two-parent'' energetic framework which we show can explain this unusual form of superconductivity \textit{without} specifying the details of the necessarily present pairing attraction. First-order transitions are crucial here: when two normal isospin-ordered states are degenerate in free energy, even a small net superconducting energy gain may stabilize an equilibrium superconductor. We demonstrate how this is possible even though the small energy gain from pairing is reduced by the expense of reconstructing the normal metal, which is needed to achieve superconducting compatibility. The first order degeneracy also gives superconductivity a choice between two normal state parents, favoring the state with the largest net free energy gain.
Comments8 pages, 3 figures
