用于捕获非阿贝尔任子的诱人霍尔丹双层膜

IF 3.7 2区 物理与天体物理 Q1 Physics and Astronomy
Valentin Crépel, Nicolas Regnault
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引用次数: 0

摘要

我们研究了双组分霍尔丹双分子层中内在拓扑有序性与超导性之间的相互作用。我们获得了该模型在有限尺寸下精确对角的相图,并提出了一些论据来评估在热力学极限下观察到的相的稳定性。我们的主要结果是,形成分数拓扑阶的费米子配对需要一个有限的临界吸引力强度。可以利用这种行为,通过门控在分数拓扑绝缘体和超导体之间创建干净的界面,其中非阿贝尔副费米子模式被困住。我们讨论了通过非均质静电门控在过渡金属二掺杂化物的双层体中实现这种界面,这应能减轻物理边缘上存在的无序和晶体缺陷的虚假效应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Attractive Haldane bilayers for trapping non-Abelian anyons

Attractive Haldane bilayers for trapping non-Abelian anyons
We study the interplay between intrinsic topological order and superconductivity in a two-component Haldane bilayer, where the two layers are coupled by an attractive force. We obtain the phase diagram of the model with exact diagonalization in finite size, and develop arguments to assess the stability of the observed phases in the thermodynamic limit. Our main result is that a finite critical attraction strength is needed to pair fermions forming a fractional topological order. This behavior can be harnessed to create clean interfaces between a fractional topological insulator and a superconductor by gating, wherein non-Abelian parafermionic modes are trapped. We discuss realization of such interfaces in the bulk of double bilayers of transition metal dichalcogenides by inhomogenous electrostatic gating, which should mitigate the spurious effects of disorder and crystalline defects present on physical edges.
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来源期刊
Physical Review B
Physical Review B 物理-物理:凝聚态物理
CiteScore
6.70
自引率
32.40%
发文量
0
审稿时长
3.0 months
期刊介绍: Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter
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