Magnetic field filtering of the hinge supercurrent in unconventional metal NiTe${}_2$-based Josephson junctions

Abstract

Topological materials with boundary (surface/edge/hinge) states have attracted tremendous research interest. Besides, unconventional (obstructed atomic) materials have recently drawn lots of attention owing to their obstructed boundary states. Experimentally, Josephson junctions (JJs) constructed on materials with boundary states produce the peculiar boundary supercurrent, which was utilized as a powerful diagnostic approach. Here, we report the observations of conspicuous hinge supercurrent in NiTe${}_2$-based JJs. Particularly, applying an in-plane magnetic field along the Josephson current could rapidly suppress the bulk supercurrent and retain the nearly pure hinge supercurrent, namely the magnetic field filtering of supercurrent. Further systematic comparative analysis and theoretical calculations demonstrate the existence of unconventional nature and obstructed hinge states in NiTe${}_2$. Our results revealed the unique hinge states in unconventional metal NiTe${}_2$, and demonstrated in-plane magnetic field as an efficient method to filter out the futile bulk contributions and thereby to highlight the hinge states hidden in topological/unconventional materials.

20+6 pages,6+5 figures

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Cited by in corpus (5)

• Majorana corner modes in unconventional monolayers of the 1T-PtSe2 family
• Thermomodulated intrinsic Josephson effect in Kagome CsV3Sb5
• Molecular Beam Epitaxy Growth and Doping Modulation of Topological Semimetal NiTe${}_2$
• Unveiling Topological Hinge States in the Higher-Order Topological Insulator WTe${}_2$ Based on the Fractional Josephson Effect
• Fractional ac Josephson effect as evidence of topological hinge states in a Dirac semimetal NiTe2