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Long-range pairing in monolayer NbSe2 facilitates the emergence of topological superconducting states

التفاصيل البيبلوغرافية
العنوان: Long-range pairing in monolayer NbSe2 facilitates the emergence of topological superconducting states
المؤلفون: Y Z Li, Q Gao, Y R Li, J X Zhong, L J Meng
المصدر: New Journal of Physics, Vol 26, Iss 5, p 053042 (2024)
بيانات النشر: IOP Publishing, 2024.
سنة النشر: 2024
المجموعة: LCC:Science
LCC:Physics
مصطلحات موضوعية: long-range-neighboring superconducting pairing, topological superconducting states under zero magnetic field, functional renormalization group approach, Science, Physics, QC1-999
الوصف: The paper systematically study topological superconducting (TSC) phases in monolayer NbSe _2 by constructing the hybrid paring tight-binding model of mixing on-site s -wave pairing ( p _s ) and long-range pairing ( p _A1 ) for the first time. We observe rich phases with both fixed and sensitive Chern numbers (CNs) depending on the chemical potential ( μ ) and out-of-plane magnetic field ( V _z ). As p _A1 increases, the TSC phase manifests matching and mismatching features according to whether the CNs match with the number of topological edge states (TESs). Strikingly, the introduction of long-range pairing significantly reduces the critical V _z to form TSC phases compared with the pure on-site s -wave paring. Moreover, the TSC phases can be modulated even at V _z = 0 under appropriate μ and p _A1 , which is identified by the robust TESs of ribbons. Additionally, the long-range pairing influences the hybridization of bulk and edge states, resulting in a matching/mismatching bulk-boundary correspondence with localized/oscillating TESs on the ribbons. Our findings are helpful for realizing TSC states through compressive strain experimentally to strengthen long-range pairings, as well as designing and regulating TSC materials.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1367-2630
Relation: https://doaj.org/toc/1367-2630
DOI: 10.1088/1367-2630/ad4abc
URL الوصول: https://doaj.org/article/1f479bfae60e45fc9c0616b1ec78b6c0
رقم الأكسشن: edsdoj.1f479bfae60e45fc9c0616b1ec78b6c0
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:13672630
DOI:10.1088/1367-2630/ad4abc