Frustrated Frustration of Arrays with Four-Terminal Nb-Pt-Nb Josephson Junctions

IF 9 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physical review letters Pub Date : 2025-10-09 DOI:10.1103/gxdc-py56

Justus Teller, Christian Schäfer, Kristof Moors, Benjamin Bennemann, Matvey Lyatti, Florian Lentz, Detlev Grützmacher, Roman-Pascal Riwar, Thomas Schäpers

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引用次数: 0

Abstract

We study the frustration pattern of a square lattice with fabricated Nb-Pt-Nb four-terminal Josephson junctions. The four-terminal geometry gives rise to a checkerboard pattern of alternating fluxes f, f′ piercing the plaquettes, which stabilizes the Berezinskii-Kosterlitz-Thouless transition even at irrational flux quanta per plaquette, due to an unequal repartition of integer flux sum f+f′ into alternating plaquettes. This type of frustrated frustration manifests as a beating pattern of the dc resistance, with state configurations at the resistance dips gradually changing between the conventional zero- and half-flux states. Hence, the four-terminal Josephson junction array offers a promising platform to study previously unexplored flux and vortex configurations and provides an estimate on the spatial expansion of the four-terminal Josephson junction central weak link area.

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四端Nb-Pt-Nb Josephson结阵列的受挫挫折

我们研究了用自制的Nb-Pt-Nb四端Josephson结的方形晶格的受挫模式。四端几何结构产生了交替通量f， f ‘穿过斑块的棋盘图案，由于整数通量和f+f ’不等重分配到交替斑块，即使在每个斑块的非理性通量量子下，也能稳定berezinski - kosterlitz - thouless跃变。这种类型的挫折表现为直流电阻的跳动模式，在电阻低谷的状态配置在传统的零通量和半通量状态之间逐渐变化。因此，四端Josephson结阵列提供了一个有希望的平台来研究以前未被探索的通量和涡构型，并提供了对四端Josephson结中心弱链接区域空间扩展的估计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks