安培超导无法由二维材料中的深亚波长腔诱导
超导电性
2024-03-21 v3 介观与纳米尺度物理
强关联电子
摘要
安培超导(Amperean superconductivity)是一种奇异现象,源于由横向规范场介导的吸引性有效电子-电子相互作用(EEEIs)。安培超导最初在量子自旋液体和高温超导体背景下提出,最近有人主张在嵌入深亚波长光学腔中的二维抛物线能带电子气中,可在 1-20 K 量级的温度下出现。本工作中,我们首先将腔诱导安培超导的微观理论推广到石墨烯的情形,进而论证这种超导态在深亚波长 regime 下无法达成。事实上,在后一 regime 中,腔仅诱导密度涨落之间的 EEEIs,而非负责安培配对的电流-电流相互作用。
引用
@article{arxiv.2210.10371,
title = {Amperean superconductivity cannot be induced by deep subwavelength cavities in a two-dimensional material},
author = {Gian Marcello Andolina and Antonella De Pasquale and Francesco Maria Dimitri Pellegrino and Iacopo Torre and Frank H. L. Koppens and Marco Polini},
journal= {arXiv preprint arXiv:2210.10371},
year = {2024}
}
备注
25 pages. Replaced with a greatly modified version, with the addition of an entirely new Section. This new Section presents a Green's function approach to EEEIs that highlights the profound difference between planar optical cavities and sub-wavelength cavities