带有 s 波超导体的 G 型四链 DNA 中的马约拉纳零模式

IF 2.3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Physics Letters A Pub Date : 2024-09-16 DOI:10.1016/j.physleta.2024.129903

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引用次数: 0

摘要

我们从理论上研究了带有 s 波超导体的鸟嘌呤-四重（G4）DNA 分子的拓扑特性。我们表明，在考虑沿 x 方向的泽曼场的情况下，G4-DNA 两端出现了具有拓扑非三维相位的马约拉纳零模（MZMs）。拓扑超导 G4-DNA 可以容纳一对 MZMs 或两对 MZMs，它们可以由化学势调节。具有一对 MZM 的拓扑超导 G4-DNA 更为稳定。拓扑超导 G4-DNA 的微分电导呈现零偏置峰结构。通过测量交叉安德烈耶夫反射可以识别 MZM。它可用于探测和控制 G4-DNA 中的 MZM。

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Majorana zero modes in a G-quadruplex DNA with an s-wave superconductor

We theoretically investigate topological properties of guanine-quadruplex (G4) DNA molecules with an s-wave superconductor. We show the emergence of Majorana zero modes (MZMs) at the ends of G4-DNA with topological nontrivial phase where a Zeeman field along x direction is considered. The topological superconducting G4-DNA can host one pair of MZMs or two pairs of MZMs, which can be regulated by chemical potential. The topological superconducting G4-DNAs with one pair of MZMs are more stable. The differential conductance of topological superconducting G4-DNA shows zero bias peak structure. MZMs can be identified by measuring the crossed Andreev reflection. It can be used to probe and control the MZMs in G4-DNA.

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来源期刊

Physics Letters A 物理-物理：综合

CiteScore

5.10

自引率

3.80%

发文量

493

审稿时长

30 days

期刊介绍： Physics Letters A offers an exciting publication outlet for novel and frontier physics. It encourages the submission of new research on: condensed matter physics, theoretical physics, nonlinear science, statistical physics, mathematical and computational physics, general and cross-disciplinary physics (including foundations), atomic, molecular and cluster physics, plasma and fluid physics, optical physics, biological physics and nanoscience. No articles on High Energy and Nuclear Physics are published in Physics Letters A. The journal''s high standard and wide dissemination ensures a broad readership amongst the physics community. Rapid publication times and flexible length restrictions give Physics Letters A the edge over other journals in the field.